Snubnosed in Alpha - I found this campground in 1992 on my first Badlands visit. The main campground was full, and they directed us out to Sage Creek. I've camped there every summer for several years.
Campground Review
This campground is basically a field in the middle of the Badlands. You must carry your own water, and the only toilet facilities are a couple of pit toilets. I know of few places as good for appreciating the night sky, and you may awaken to bison walking through your campsite. One of the great things about this campground is the people who frequent it. You are likely to meet some good kids in their twenties on a road trip who are staying here because it is free. A lot of people do not bother with pitching a tent, but opt instead for sleeping on the ground under the stars (in dried buffalo poop). The Badlands/Sage Creek stay has typically been on the way to or from Yellowstone or other bigger attractions. But my memories of eveings at Sage Creek are the ones that have stuck. Nice place.