Kadoka to Rapid is about 90 minutes, to Murdo about another 30 minutes. Rapid to Deadwood is about 45 minutes. The Badlands are just West of Kadoka. They’re building hotels like crazy along I 90, you would think the competition would drive prices down. Might have to look at an Air B&B?
If you’re camping there’s several campgrounds once you get west of Piedmont.