The only accommodation available in Wind Cave National Park [1] is the Elk Mountain Campground. Located one mile north of the visitors center, the campground has 75 sites available on a first-come, first-served basis. Each site can accommodate two vehicles and up to eight people. There are two wheelchair-accessible sites.
Facilities include restrooms with flush toilets and cold running water. There are no showers and there are no hookups for RVs, although there are some pull-through sites available for RV use. In the summer, fees are $12 per site per night. In the winter, once the water is turned off, fees drop to $6 per night.
Backcountry camping is allowed in the northwestern part of the park. Campers must have a permit, which is free, and which can be obtained at the visitors center. Pets are not permitted in the backcountry.
Located 11 miles south of the park, the city of Hot Springs [2] has many hotels and other accommodations for park visitors.
Links:
[1] http://www.moon.com/destinations/mt-rushmore-the-black-hills/the-southern-hills/wind-cave-national-park
[2] http://www.moon.com/destinations/mt-rushmore-the-black-hills/the-southern-hills/hot-springs