RV limits: Sequoia, Acadia, Shenandoah and Smokies

Sequoia’s length advisories, Acadia’s restricted roads, Shenandoah’s tunnel height and the Smokies’ campground rules require separate access and campsite decisions. Compare the complete RV with the precise road segment, current access restrictions and campsite; one park-wide size assumption will miss these differences.

Sequoia: an advisory is different from a prohibition

Sequoia’s oversized-vehicle guidance advises against vehicles over 24 feet between Foothills Visitor Center and Potwisha, and over 22 feet between Potwisha and Giant Forest Museum. It prohibits single vehicles over 40 feet on the latter segment.

Moro Rock/Crescent Meadow Road prohibits single vehicles over 22 feet and vehicles towing units. Crystal Cave Road prohibits vehicles over 22 feet; Mineral King campgrounds prohibit RVs and trailers.

Kings Canyon’s Panoramic Point Road also prohibits them. NPS identifies Big Stump via Highway 180 as the preferred entrance for longer vehicles.

A measured 25-foot vehicle is one foot above the lower segment’s advisory and three above the upper segment’s advisory. Being below the 40-foot prohibition does not make the advised-against route suitable.

Acadia and Shenandoah: route height matters

Acadia closes Cadillac Summit Road to RVs and trailers. Its Park Loop Road restrictions include 12 ft 2 in between Sieur de Monts and Sand Beach entrance, and 12 feet from Fabbri Picnic Area to Wildwood Stables. The shortest underpass is 11 ft 8 in.

NPS lists Marys Rock Tunnel at 12 ft 8 in. Include roof equipment in the measured vehicle height and follow current posted clearance and conditions. A listed tunnel height does not provide an operating margin for a vehicle of equal height.

Smokies: reserve and budget for no utility hookups

Great Smoky Mountains requires advance campground reservations year-round, with no first-come sites. It lists no utility hookups or showers, a 14-consecutive-day stay limit before moving campgrounds, and at most two motor vehicles or one vehicle with a trailer per campsite.

Generator use is prohibited 8 p.m.–8 a.m. and in generator-free areas, including engine-idling battery charging there. Quiet hours are 10 p.m.–6 a.m., so a 9 p.m. generator run fails even though quiet hours have not begun. Use approved waste facilities and the selected site’s vehicle-length limit.