Stopped for one night on the way through. Seemed like a little decent place next to the river and the badlands. Nice and easy to find about just off the interstate. The washrooms and showers were old but were pretty clean. Medora is a pretty small place but it's very touristy and was kind of neat to check out. Wifi worked well.
Great place to camp with kids as there are a lot of things for them to do, and most of it is included in the regular rate. If you're used to a "RV Park" type of place, where you don't have much space, then you'll be fine. I didn't expect the privacy of a state or provincial park as I chose the full hookups over the privacy since most of our days were spent checking out the Black Hills. Only gave it a 7 since I think they could knock about $10 off the nightly rate.