Badlands National Park
Badlands National Park is a recognized dark sky location in South Dakota for stargazing and astronomy activities.
Bortle
Badlands National Park is rated BORTLE CLASS 2.
Star party:
Badlands hosts a popular large star party annually.
Type
As a U.S. national park, various camping options may be available, including frontcountry, dispersed (boondocking), and backcountry (backpacking/primitive). A permit may be/is required.
For more info, see their website. See also all dark sky places in SD.