Close to Rushmore and has a variety of accomodations, facilities and amenities. They have camping, RV sites, cabins and lodge all available. Something for everyone and range of prices.
We stayed there with a large group. Some with RV's, others camped out in tents and some stayed in "rustic" cabins and those who didn't want to rough it stayed in the lodge. Kids like the camping out though so they're fine with it.
http://www.palmergulch.com/