We're planning a trip inlate Aug and are hoping ptsee Mt Rushmore and the Badlands. Looking at Elk Mtn in Wind Cave NP (based on a suggestion on this site). We prefer no hookups, even boondocking. We're hoping to play tourist some, hang around camp some, and even have a day of hitting a trail in the Badlands. The kids are grown; this trip is me, DW, and 2 dogs- suggestions are very much appreciated! Thanks!