Question: are rvs allowed in national parks?
Answer: RVs up to 12′ in length fit in every national park campground in the United States, although there are a few campgrounds that don't allow RVs at all and are tent only. ... RVs up to 40′ in length fit in 53% of all national park campgrounds (Remember that many of the parks will only have a few sites this size, however.