We just did a week trip out to South Dakota's Black Hills and ended up staying at Horse Thief Campground. We were thrilled with our stay. It is nestled in the hills behind Mount Rushmore (their address is Hill City), plenty of trees, great spots and hookups, nice and clean bath houses and hot showers, picnic tables and fire rings at each spot, two playgrounds, a pool, and very pleasant owners. They even have a little lodge store, with a freezer full of ice cream treats which thankfully my kids didn't discover until day 3! If you don't have a camper, there are plenty of tent spots, and several super cute wee cabins to rent. As we are new to PUP camping, we haven't had a lot of experience with campgrounds, but I sure feel lucky we found this place -- why do people go to those glorified parking lots right off the road with no trees or much grass? -- and we'd highly recommend it and we'd stay here again in a second.