Taking Your Campervan or Motorhome on a Ferry: Essential Rules and Regulations

There comes a point in every campervan or motorhome trip when you can no longer control things. You're in a queue on a dock in Hirtshals or Ancona, engine off, watching the line of vehicles slowly move onto the ship. If something is wrong with your booking at that moment, there's no alternative. You can't go back to the website. You can't explain that you didn't know.

What goes wrong is rarely a full ship; you'd know that in advance. What goes wrong is almost always something minor that nobody told you about: an extra gas cylinder, a bike rack not included in the booking, or an LPG installation that should have been declared.

This article covers those details. All information below has been verified against the official terms and conditions of the ferry operators themselves, with a reference date of August 2026. Where sources conflict, that is noted.

Your Gas Cylinders Are the Real Stumbling Block

Most campervan and motorhome owners assume that gas cylinders are allowed as long as the valve is closed. This is broadly true, but the number and weight limits vary significantly. The dividing line roughly runs between Northern and Southern Europe, with Scandinavia being a notable outlier for strictness.

English Channel, North Sea, and Irish Sea: 47 kg (103.6 lbs)

These ferry operators base their regulations on UK guidelines: Marine Guidance Note 545 from the UK Maritime and Coastguard Agency, published on April 4, 2016, and still valid. It stipulates that propane and butane for private use are permitted up to a total of 47 kg (103.6 lbs), excluding the weight of the cylinders themselves.

An interesting detail: the MGN primarily sets the 47 kg (103.6 lbs) limit, not the number of cylinders. An earlier recommendation referred to "47 kg in three cylinders"; that specific number has since been dropped. Consequently, ferry operators now implement this standard in different ways.

Stena Line permits a maximum of three cylinders with a combined weight of 47 kg (103.6 lbs), requiring the main valve to be closed throughout the crossing. Restricted goods must be declared at least 24 hours in advance, and 72 hours in advance for the Harwich–Hook of Holland route.

DFDS handles it differently, and this is a correction to information found in many places. The current terms and conditions on DFDS's vehicle page state: gas cylinders up to a maximum weight of 47 kg (103.6 lbs) are allowed, with at least one needing to be connected to an appliance such as a refrigerator. There is no maximum number of cylinders specified. Transport of gas must always be declared at check-in.

The phrasing "two 11 kg cylinders," often heard from DFDS staff and found in older articles, does not align with the currently published text. Assume the 47 kg (103.6 lbs) limit.

P&O Ferries allows a maximum of three butane or propane cylinders, with a combined weight not exceeding 47 kg (103.6 lbs), exclusively for lighting, heating, and cooking. Two things P&O does differently: gas cylinders must be declared at the time of booking, and partially filled or empty cylinders are treated as full. On Irish Sea routes, an additional rule applies: a maximum of three cylinders, each not exceeding 11.2 kg (24.7 lbs).

Scandlines follows the same 47 kg (103.6 lbs) standard, with the same restriction to lighting, cooking, and heating.

Brittany Ferries: Two Sites, Two Rules

This finding was the one I spent the longest on, as I thought I was misreading something.

The UK website for Brittany Ferries states: a maximum of three butane or propane cylinders, with a combined weight not exceeding 47 kg (103.6 lbs). There is no limit per cylinder. Foot passengers may carry a maximum of two cartridges of 450 grams (15.9 oz).

The French website of the same operator states: a maximum of three gas cylinders of 15 kg (33.1 lbs) each, exclusively for domestic purposes.

Three 15 kg (33.1 lbs) cylinders total 45 kg (99.2 lbs), so in practice, you end up with roughly the same overall limit. However, the wording differs significantly: the French version imposes a limit per cylinder, the British version does not. If you travel with three 6 kg (13.2 lbs) cylinders, you're fine with both. If you carry one 25 kg (55.1 lbs) cylinder, you are within the rules according to the British text but outside according to the French.

This explains why you've seen both figures circulating on forums for years. It's not a misunderstanding—these are two official texts from the same ferry operator. Adhere to the language version corresponding to the country from which you book, and if in doubt, assume the stricter interpretation: no cylinder over 15 kg (33.1 lbs), and a combined total not exceeding 47 kg (103.6 lbs).

No separate regime for Spain routes versus France routes is found on the official pages; the gas rule is formulated generally.

Scandinavia: Much Stricter Than Expected

Travelers arriving from continental Europe with a standard campervan or motorhome setup will encounter issues here.

Color Line permits propane and butane for private use in cylinders of a maximum of 2.5 kg (5.5 lbs) each, excluding the weight of the cylinder. For larger volumes, Color Line refers to its freight department. To put that limit into perspective: 2.5 kg (5.5 lbs) is a camping gas cylinder. A common campervan or motorhome cylinder of 11 kg (24.3 lbs) is well beyond this limit.

Furthermore, Color Line requires the main valve to be closed before driving on board, and crucially, access to the cylinder must not be locked—so that the crew can remove the cylinder in case of fire.

Fjord Line distributes a safety seal and a sticker at check-in. The seal goes on the valve of the closed gas tank, and the sticker must be visibly displayed behind the windshield. Dangerous goods, including gas cylinders, must be reported to the customer service center via email in advance—not just at the dock.

A nuance I was too definitive about in my first draft: the frequently mentioned limit of two 11 kg (24.3 lbs) cylinders is Norwegian ADR legislation that applies to campervans/motorhomes in general, and not an explicit Fjord Line clause. I also could not find the requirement for a gas certificate on the official Fjord Line page. Expect the Norwegian legal limit, but treat the certificate as unconfirmed.

Those driving to Norway via Denmark and Sweden, instead of taking a direct ferry crossing, bypass this entire chapter.

Baltic Sea

Viking Line is the only ferry operator that physically seals gas. The official terms state: gas cylinders may only be carried in a campervan or caravan, their location must be indicated, and the main valve must be closed and sealed with special tape—with staff assistance.

For Finnlines, a limit of four cylinders circulates. I have not been able to confirm this on any official Finnlines page. Do not take it as definitive.

Mediterranean Sea: It's Not About Cylinders

Here, the situation is different. Grimaldi, Moby, Tirrenia, and GNV do not publish limits on the number or weight of loose gas cylinders. Their rules concern something else: whether your vehicle itself runs on LPG (liquefied petroleum gas) or methane.

GNV requires LPG vehicles to be declared upon embarkation. They are then parked in a separate section of the garage, and the shut-off valves of the gas tank must remain closed during the journey. GNV also prohibits the use of gas or electric cooking appliances and anything with an open flame, anywhere on the ship. That is a usage ban, not a transport limit.

Tirrenia requires declaration of gas vehicles both at booking and at embarkation, and mandates that the tank be half-full or less at departure. Here, I must correct my earlier phrasing. I wrote that failure to comply would result in forfeiture of your right to transport. This is not stated in the terms. What is stated: in case of non-compliance, the carrier may cancel the booking and automatically place you on that day's waiting list, after payment of the due difference plus a penalty of 50 euros. More concrete, and less dramatic, but still a ruined morning.

Grimaldi's general terms and conditions state that upon embarkation, you must declare whether the vehicle has a gas installation, that it must be certified in the vehicle registration document, and that the shut-off valves remain closed while the vehicle is on board.

Corsica Ferries is the Mediterranean exception with an explicit limit: three cylinders, totaling a maximum of 47 kg (103.6 lbs). More importantly for those heading to Corsica: LPG vehicles are not permitted at all on the Corsica Express catamarans.

Declaration: At Booking or At Check-in

This is where problems often arise in practice, as it varies by ferry operator. With P&O Ferries, you declare gas cylinders at the time of booking. Tirrenia requires it at booking and at embarkation. Corsica Ferries and Moby ask for it at booking. Stena Line requires 24 hours in advance, and 72 hours for Harwich–Hook of Holland. Fjord Line wants an email in advance and gives you a seal at check-in. DFDS and GNV are satisfied with declaration at check-in, and Color Line works with a seal and marking at the dock.

They Will Measure Your Campervan or Motorhome

The price is a function of both length and height, and both are checked.

DFDS uses three campervan/motorhome categories: up to 7 meters (23 ft), up to 10 meters (32.8 ft), and up to 12 meters (39.4 ft), with a maximum height of 4 meters (13.1 ft). The terms are explicit: choose the correct vehicle size including all additions such as bike racks, tow bars, and roof racks. Vehicles incorrectly declared at booking risk refusal of embarkation or additional charges at the port.

Irish Ferries primarily bases its pricing on height. Up to 2.25 meters (7.4 ft) high and shorter than 8 meters (26.2 ft), you fall into the campervan/motorhome fare. Above 2.25 meters (7.4 ft), you move up a category. Above 8 meters (26.2 ft), height no longer matters, and a third category applies. Above 12 meters (39.4 ft), you pay freight rates. Anything on your roof counts.

Corsica Ferries requires any vehicle longer than 5 meters (16.4 ft), higher than 1.90 meters (6.2 ft), or wider than 2 meters (6.6 ft) to be declared at reservation. In practice, 7 meters (23 ft) is the relevant fare threshold: a 6.90 meter (22.6 ft) campervan/motorhome falls into the lower category, but the same vehicle with a bike rack no longer does.

Stena Line handles long campervans/motorhomes differently: above the maximum length, you book as a vehicle plus trailer. A 15 meter (49.2 ft) campervan/motorhome would then be booked as a 12 meter (39.4 ft) vehicle and a 4 meter (13.1 ft) trailer.

What It Costs If You Declare Incorrectly

No ferry operator publishes a fixed penalty table. Corsica Ferries states sharply in its terms: should you forget to declare the dimensions, the ferry operator reserves the right to refuse embarkation or to charge the difference between the category prices—even for the outbound journey if it has already been made. And then follows the sentence that concludes the topic: any surcharge requested at departure is not a penalty but a fare adjustment based on the actual size of your vehicle.

In practice, this means you pay the difference between what you booked and what you are. This difference varies with the route, season, and length category, and can amount to over a hundred euros on busy Corsica departures in high season. Worse is the second possibility—being refused—because that is not a cancellation: you have paid for a service you cannot use due to your own actions.

Therefore, physically measure your campervan or motorhome once, including everything attached to it or on top of it, and write down that number. It is not in your vehicle registration document. If in doubt, choose the larger category. For British drivers, remember the 3,500 kg (7,716 lbs) limit for a category B license (post-1997 license holders). If your vehicle is heavier, ensure you have the appropriate license category, such as C1, or a pre-1997 Category B license which typically allows for heavier vehicles.

Camping on Board Has Largely Disappeared

Many older travel reports are no longer accurate here, which is precisely why you should be cautious about what you read online.

Camping on board—sleeping in your own campervan or motorhome on the car deck, with an electricity connection—was for years the primary argument for sailing to Greece via Ancona or Bari. This service, offered by Attica Group (which includes Anek Lines, Superfast Ferries, and Blue Star Ferries), has been abolished on all routes to Greece since 2025. No overnight stays in your own campervan/motorhome, no 220 volt power on the car deck.

What still exists: Star Lines offers it on the Brindisi–Vlora route to Albania, exclusively on the ship European Star. Showers, toilets, and 220 volt connections are available, and the service applies only to vehicles registered as campervans or caravans. Gas use during the crossing is prohibited, and the cylinder must be closed before embarkation. The exact seasonal dates for 2026 cannot be confirmed via an official Star Lines document—it is a summer service, but check the dates before planning around it.

In Northern Europe, the UK, the Baltic Sea, and Scandinavia, camping on board does not exist. I have not found any ferry operator offering anything similar there. The car deck is always closed during the voyage.

Grimaldi does not have camping on board but does offer a campervan/motorhome fare. Under the name Super Camper 2026, a 15 percent discount applies to fares for campervans/motorhomes and minibusses up to 9 meters (29.5 ft), on Civitavecchia–Barcelona and Porto Torres–Barcelona, in both directions, for bookings until December 14, 2026. Three things to know: the EU ETS costs are excluded from the discount and are non-refundable, the discount is automatically applied to the Special fare, and—this is the interesting part—the promotion expires per route once the garage is 80 percent full. Early booking here is therefore not just a matter of availability but directly of price.

Note: on comparison sites, you may see 20 or 25 percent for this promotion. The official Grimaldi page states 15 percent.

You Won't Have Access During the Crossing

With Color Line, Fjord Line, Stena Line, Tallink Silja, and Smyril Line, the car deck is locked as soon as the ship sails. Three practical consequences that people underestimate:

Your refrigerator will be off. It is not allowed to run on gas anyway, and 220 volt power on the car deck is prohibited. Color Line has found a solution: on the Color Magic and Color Fantasy, there are freezers on board where you can store your goods—but you must take them there yourself before the deck closes.

Your dog cannot stay in the campervan/motorhome unless the ferry operator explicitly allows it. Brittany Ferries distinguishes by route: on France crossings, dogs may remain in the vehicle, but on longer Spain routes, they may not—a pet-friendly cabin or kennel is mandatory there. On some departures, there are no pet-friendly cabins or kennels at all. On Greek routes, pet-friendly cabins cost roughly 25 to 50 euros per animal per trip, and deck kennels around 25 euros.

Smyril Line requires special attention here. Pets are not allowed in cabins; violation incurs a cleaning fee of 3,000 Danish Krone, approximately 405 euros. A cage must be booked at the time of reservation; these are numbered, with 1 to 4 for small and 5 and 6 for large cages, and a key deposit of 200 Danish Krone applies.

But the most important point is this: dogs cannot travel to Iceland via ferry at all. Smyril Line states unequivocally: pets cannot be transported to or from Iceland. The Icelandic Food and Veterinary Authority (MAST) confirms that all pets must arrive at Keflavík Airport and that arrival by ferry is not permitted. The kennels on board the Norröna are therefore only usable up to the Faroe Islands. Anyone wishing to take their dog to Iceland must fly, with an import permit, microchip, rabies vaccination with titer test, and quarantine.

Anything you need during the journey must be taken with you when you leave the campervan/motorhome: medicines, jacket, water, chargers, and for overnight crossings, your wash bag. This sounds obvious until you forget it on a sixteen-hour crossing.

The Ramp: The Risk Not Stated in the Terms

This is not mentioned in any ferry operator document, but it happens: a campervan or motorhome with significant overhang behind the rear axle getting stuck on the kink of a steep ramp.

Large ports like Dover and Calais have long ramps that adjust with the tide; it's rarely a problem there. Small ports at low tide are another story. In Greece, you often see crews routinely laying thick mats at the kink. A common trick used there: drive onto the ramp at an angle of approximately 45 degrees, so one rear wheel lifts earlier, preventing the overhang from putting its full weight on the lowest point all at once.

If in doubt, ask for guidance. The crew does this daily.

Costs and Booking Times

On Norwegian domestic ferries, a system operates independently of international ferry operators. The AutoPASS-regulativ determines that vehicles are charged based on their measured total length at the quay or on board, including cargo. Below the first length limit of approximately 6 meters (19.7 ft), a fixed fare group applies; above that, the fare increases with length. Passengers travel free; you only pay for the vehicle. Note that Norway, Sweden, and Denmark use their own currencies, not the Euro.

There is a misunderstanding about discounts that can be costly. AutoPASS offers a 50 percent discount, but only with a valid AutoPASS-ferje agreement with prepayment. If you only have a tag without such an agreement, the discount is 10 percent. For those taking many ferries, the difference is significant.

What I have not been able to confirm: the rule of thumb that a 7-meter (23 ft) campervan/motorhome pays approximately double that of a passenger car. This depends on the length class and distance zone of the specific route; there is no fixed ratio in the regulativ. Use the ferjekalkulator (ferry calculator) for your specific route.

On Adriatic routes, early booking discounts of up to 40 percent are common, plus 20 to 25 percent for members of motoring clubs like the AA (UK), ADAC (Germany), ÖAMTC (Austria), or TCS (Switzerland), and up to 30 percent on return bookings.

For Stena Line on Harwich–Hook of Holland, 2026 is remarkably favorable. Campervans/motorhomes pay the car rate on day crossings with the promo code CAMPER, valid for bookings and travel until March 31, 2027, excluding July and August. Caravans travel free on these day crossings, except between July 1 and August 31, 2026—then a 50 percent discount applies. Both promotions are valid only on day crossings and do not apply to cabins, meals, pets, or surcharges.

The EU ETS Surcharge

Since January 1, 2024, commercial ships over 5,000 gross tons calling at EU ports fall under the European Emissions Trading System. These costs appear separately on your ticket, often described as an environmental surcharge, and operate like a bunker surcharge: they can fluctuate monthly.

Two things you should know. Firstly, they are excluded from discounts and refunds—Grimaldi explicitly mentions this in all its 2026 promotions. Secondly, the scheme is being phased in: for 2024, 40 percent of emissions had to be accounted for, for 2025, 70 percent, and from 2026, 100 percent. The European Commission calculated that ETS costs increased ticket prices on European ferry routes by 3 to 11 percent in 2024. This surcharge will therefore continue to rise in the coming years.

Where Certainty Ends

An article like this is only useful if you also know its limitations. Here are four things I could not definitively confirm:

Finnlines and the number of gas cylinders: the limit of four cylinders mentioned on comparison sites is not found on any official Finnlines page. The gas certificate for Fjord Line is widely cited but not verbatim in the official terms and conditions. GNV does not publish any clause about loose gas cylinders—if you're traveling with cylinders approaching 47 kg (103.6 lbs), call them. And while Star Lines' camping on board is confirmed, the exact start and end dates for 2026 are not.

And then one observation you should keep in mind. There is a gap between the rule and its enforcement. Many campervan and motorhome owners report that on short crossings, nobody ever checks their gas cylinders, while controls at the Channel Tunnel are very strict. This is fine as long as everything goes smoothly. The problem is that during a check, you will be held accountable to the published rule, not common practice—at a point when you can no longer change anything.

Checklist

Before you book: Physically measure your campervan or motorhome, including bike rack, roof box, satellite dish, and tow bar, and note its length, height, and width. Count and weigh your gas cylinders; if you're traveling with Color Line, assume 2.5 kg (5.5 lbs) per cylinder. Check if your route has capacity issues for high vehicles—Corsica and the ferry to Iceland fill up in summer. For drivers with a Category B license obtained after 1997, confirm your vehicle's Gross Vehicle Weight (GVW) does not exceed 3,500 kg (7,716 lbs).

When booking: Declare LPG or methane if the system asks for it, mandatory with P&O, Corsica Ferries, Moby, Tirrenia, and Grimaldi. If in doubt, choose the larger size category. If traveling with a dog, book a pet-friendly cabin or kennel immediately—and if you're going to Iceland, know that your dog cannot travel by boat.

At check-in: Close the gas valve before entering the terminal and ensure the gas locker is accessible. Affix any seal or sticker you receive. Take everything you need during the crossing out of the campervan or motorhome.

All rules in this article have been checked against the official terms and conditions of the ferry operators and against MGN 545 of the UK Maritime and Coastguard Agency, reference date August 2026. Ferry operators regularly change their policies, and most terms and conditions pages do not show a modification date—always check the terms for your specific route and departure before booking.