Yellowstone National Park offers 11 campgrounds with over 2,000 campsites, all requiring advance reservations except Mammoth Campground (first-come, first-served October 15-April 1).

Facilities range from developed campgrounds with flush toilets and showers to primitive sites with vault toilets, with several locations offering dump stations and generator-permitted RV sites.

Key access information: reservations open six months in advance on a rolling basis, camping is limited to 14 days during peak season (June 15-September 15) and 30 days otherwise, and no overnight parking is permitted outside designated campgrounds.