There is now a National park Minute Man Missle museum on I 90 at the junction of 240 south to Interior and the Badlands National Park. It is worth your time. They offer a guided tour of a missle site OR a tour it yourself site with handheld recording to tell you all about it.
The rv park at Badlands is ok. The restaurant at the park is very good...try the Indian Taco.
Wall is just an interesting bit of history trivia and fun to see.
Lots to see in the Black Hills. Deadwood is fun.
The Bighorn Mts in WY are pretty high, so go around them via I 90 to Billings and then you can so south to Cody or go on to Livingston and go south into Yellowstone there.
Make reservations for Yellowstone NOW.
We like Bridge Bay campground because it is sort of central to the park. No elec there, but water and dump station.
