Cottonwood Campground lies inside the park, about 5 miles from Medora, ND. It is the South Unit's only campground. Half the sites are by reservation at recreation.gov while all remaining sites are first come, first served. Most sites are suitable for tents and RVs (no hookups). Cottonwood Campground fills to capacity each afternoon, mid-May through mid-September.

Juniper Campground is 5 miles from Hwy 85 and is the only campground in the park's North Unit. All sites are open to tent camping and most can also be used by vehicles/RVs (no hookups). All regular sites are first come, first served. The group site is by reservation only at recreation.gov. See the RESERVATIONS section below.

Roundup is the park's only camping facility in which horses are permitted. This private campsite is located 12 miles from Medora, ND in the park's South Unit. It is reserved by one group at a time; space is not be shared among different parties. Reservations for Roundup begin each season on the first business day in March at 8:00 am MST. See the RESERVATIONS section below. Roundup can accommodate up to 20 people and 20 horses or 30 people if camping without horses.