We love going to Oahe Downstream Campground every year. We have camped in both Campgrounds. Campground # 2 is closer to the river so it feels much cooler than Campground 1. Lots of things  to enjoy if you have kids or even Teens.  They have a 18 hole Disc Golf coarse . Bring your bikes because you can ride to the trailrace area or around the campgrounds.  There are other biking & hiking areas with in the area and Pierre Sd. You can go kayak or visit the beautiful Butterfly garden. If you love to camp in the fall this is the place beautiful foliage and always quiet.