We camped here on a Sunday night.  Lots of campers along a road which was about 6 miles long along the top of a cliff.  We thought we found a nice spot away from others, but two huge campers pulled in after dinner right next to us on the opposite side of the road.  Beautiful view of the badlands and we enjoyed watching the sunset from our site.  After we went to bed, the wind picked up big time and howled for several hours.  It was strong enough to shake the trailer.  It died down before midnight.  You can't really hike down into the badlands from the cliff so the only place to walk is along the top of the cliff past the other campers.  No services, but free.