Really beautiful site here with lots of easy and moderate trails to explore with lovely sunrise/sunset and wildlife! Similar feel to Badlands with some fewer crowds. You can’t choose a bad place to camp but be sure to drive through both the north and south areas. Pretty simple campground. Plan to stay at least two nights.
Yay: some of the sites are first come/first serve so if you don’t have a reservation you might get a spot (yay spontaneous adventures). Lots of different campsite configurations so you don’t have to be next to an RV in your tent.
Nay: pretty much guaranteed to fill up on summer/holiday weekends, trails were muddy when we were there in July.
Surprise: BISON EVERYWHERE!! If you have kids don’t let them wander around, the bison are close and plentiful!!