Seattle RV Rentals: RVs on Washington State Ferries and Park Length Limits

Seattle RV Rentals checks each Seattle-area RV against the campground you want and the ferry you have to take, so you know what fits and what the crossing costs before you pay a deposit. On October 15, 2026, its live listing page showed 48 of 469 RVs listed within 50 miles of Seattle, and not one of those 48 published an exterior height, the measurement Washington State Ferries uses to roughly double the fare for a vehicle under 30 feet.

What Seattle RV Rentals does for you

• Shows the measurement that sets your ferry fare. In the site's September 5, 2026 count, 472 of 473 Seattle listings published a length and only 33 published a height. Every listing card shows the height where the host gave one, and "Not published, ask the host" where they did not.

• Checks the RV against the campground before you book. One table holds every published length cap within reach of Seattle: 14 campgrounds at Olympic, Mount Rainier and Moran State Park, each with its trailer cap where the park states one. White River at Mount Rainier takes a 27 ft motorhome but only an 18 ft trailer.

• Prices the trade-off between RV classes. On September 5, 2026, travel trailers were the cheapest class at a median $126.00 a day and 20% of them cleared White River. Class B motorhomes cost a median $273.00 and 100% cleared it.

• Puts every crossing in one fare table. Seven Washington State Ferries routes and six vehicle bands, read one route at a time on September 5, 2026, plus the 3% card surcharge that began on March 1, 2026.

• Lets you book directly with the host. You reserve on Outdoorsy, where the host sets the price and terms. On September 5, 2026, 272 of 473 listings (58%) offered delivery, at a price each host sets.

The 7 ft 2 in line, counted on October 15, 2026

Washington State Ferries sells a vehicle under 30 feet two fares: one under 7 feet 2 inches tall and one over it. Across the seven crossings the site measured, the taller fare runs 1.96 to 1.99 times the shorter one. We counted the 48 listings seattlerv.rentals showed on October 15, 2026 by length:

• 17 were 22 to under 30 feet. For these, height alone picks the fare. Seattle to Bainbridge was $40.00 or $79.00 one way, and Anacortes to Friday Harbor $128.90 or $256.75, at the September 5, 2026 fares.

• 26 were under 22 feet. Washington State Ferries does not state which fare applies to a vehicle that short but taller than 7 ft 2 in. Check the fare calculator for your route before you book.

• 5 were 30 feet or longer. These pay by length band, so height does not change the fare.

• 0 of 48 published a height.

Ask the host for the exterior height in writing, in Outdoorsy messages, before you book any trip that needs a ferry. Skip it, and on the Friday Harbor run the gap was $255.70 round trip at the September peak fare, settled at the tollbooth. From October 1, 2026 the taller fare on that route dropped to $190.40 one way; the site has not published the off-peak fare for the shorter band, so price it at the Washington State Ferries fare calculator.

Plan a Seattle RV trip in four steps

1. Pick the destination first, because it sets the cap. Olympic's standard site is 21 ft, with a few to 35 ft. Mount Rainier caps White River at 27 ft for an RV and 18 ft for a trailer. None of the 7 North Cascades campgrounds publishes a limit, and silent is not the same as unlimited. Five destinations, five different constraints.

2. Find the tightest limit on your route. For a towable, use the trailer cap, which is always the tighter number. Washington State Parks keeps most limits inside its reservation system, so the site carries only two: Moran's 45 ft site cap and Deception Pass's 25 ft access limit. Every published length limit in one table.

3. Get the height, then price the crossing. At the September 5, 2026 peak fares, a 24 ft trailer over 7 ft 2 in paid $513.50 round trip to Friday Harbor, or $528.91 by card. seattlerv.rentals/ferry-fare-calculator.

4. Choose an RV that clears it, then book with the host. Of the 48 listings shown on October 15, 2026, 26 were 21 ft or shorter and would fit Olympic's standard site. Only 6 were 18 ft or shorter, the White River trailer cap. seattlerv.rentals/rv-rentals.

Quick answers for a Seattle RV trip

• Can I take an RV on a Washington State Ferry? Yes, and the fare goes by length and, under 30 ft, by height. At the September 5, 2026 fares, the cheapest tall crossing was Mukilteo to Clinton at $46.90 one way and the dearest Anacortes to Friday Harbor at $256.75. Taking an RV on a Washington State Ferry.

• When do San Juans ferry fares drop? The peak tariff on Anacortes to Friday Harbor ended on September 30, 2026. A tall vehicle under 30 ft paid $256.75 one way that day and $190.40 on October 1, so one day later saved $132.70 round trip. Washington State Ferries does not publish that boundary as a date. When the San Juans fare falls.

• Can I dump my tanks at Mount Rainier? Not on the site's last reading. The park states no hookups in any campground, and its only RV dump station, at Cougar Rock, is closed until further notice. Find a dump outside the park before you go in. RV camping at Mount Rainier.

• Is Whidbey cheaper than the San Juans for an island night? Yes, by $209.85 each way for a tall vehicle under 30 ft, or $419.70 round trip, at the September 5, 2026 fares. RV camping on Whidbey Island.

• Will a long RV get into Deception Pass? The park states no campsite length cap, but nothing over 25 ft may enter the West Beach parking area, and Bowman Bay carries the same 25 ft restriction. A valid site reservation does not change that. Deception Pass State Park.

• Does the host deliver? Many do, at their own price. On October 15, 2026, 35 of the 48 listings shown said delivery was offered by the host. Arrange it with the host on Outdoorsy. How Seattle RV Rentals works.

Park rules on this page were read on seattlerv.rentals on October 15, 2026, which quotes them from the National Park Service and Washington State Parks, measured September 5, 2026. Closures and fares change, so confirm at the source before you spend money.

Seattle RV guides on seattlerv.rentals

• Home: Seattle RV Rentals

• Live listings with length and height on every card: seattlerv.rentals/rv-rentals

• Every RV class measured against the parks: seattlerv.rentals/rv-types

• Olympic's 21 ft standard site: seattlerv.rentals/destinations/olympic-national-park

• San Juan Islands and Moran State Park: seattlerv.rentals/destinations/san-juan-islands

• North Cascades, no ferry and no published cap: seattlerv.rentals/destinations/north-cascades

• Anacortes to Friday Harbor, route by route: seattlerv.rentals/ferries/anacortes-friday-harbor

• The RV measurement that decides your ferry fare: seattlerv.rentals/guides/rv-height-and-ferry-fares

• Why a trailer costs less per night and closes more campgrounds: seattlerv.rentals/guides/trailer-vs-motorhome-washington

• Ask for rentals sized to your trip: seattlerv.rentals/quote

Seattle RV Rentals (seattlerv.rentals) helps you find Outdoorsy RVs within 50 miles of Seattle. Bookings, delivery and insurance are arranged with the host on Outdoorsy, and some links on the site are affiliate links. Not affiliated with Washington State Ferries, the National Park Service or Washington State Parks. Contact: seattlerv.rentals/contact. Banner image is AI-generated. Last updated October 15, 2026.