Is there rv camping areas?

Yes there is a camping and rv areas

At Medora campground they have all the hookups. Stayed a total of 2 weeks.

Not directly in the park. But there are spaces to stay temporarily as you sight see, and there are campgrounds near by

There's a great campground in Medora just outside the south entrance. It's the Medora Campground. You can rv camp in the park, but there are no hookups.