South Dakota

popular, wall drugs; scenic, the corn palace. badlands
bumpy

A lot of miles of flat farmland between the two. I think it is beautiful in the spring but not really known as a scenic destination. The Badlands NP is worth a day trip, Corn Palace at Mitchell is worth an hour or so, some nice parks, museums and galleries in Sioux Falls, Laura Ingalls Wilder homestead in DeSmet, Terry Redlin gallery in Watertown. Look at SD state parks website for ideas.

We really enjoyed our visit to Pipestone National Monument in southwest Minnesota. There is a pretty nice commercial campground just a couple blocks away, or you're not that far from Split Rock Creek State Park.
You might want to find another stop in South Dakota, but Pipestone is pretty close to being right on your way.

Must stop at Badlands National Park and Wall Drug - the loop through the park actually starts on the West end at Wall

The Falls in Sioux Fall are very interesting

I think it is a state law that everyone has to stop at Wall Drug. At least they had people stopping cars on the outskirts of town the last two times I passed through. They said it was a survey...but there were a number of Highway Patrol cars around....

Theodore Roosevelt NP in Medora, ND. Stay at the Municipal campground in the summer because it has a pool.

rr2254545 wrote:
Must stop at Badlands National Park and Wall Drug - the loop through the park actually starts on the West end at Wall

The Falls in Sioux Fall are very interesting

The falls are great, but so is the Butterfly House and Marine Cove. It is a GREAT place to stop.

Dick_B wrote:
Theodore Roosevelt NP in Medora, ND. Stay at the Municipal campground in the summer because it has a pool.

The natural way to drive would be south out of Minneapolis and then west through SD. When I make the drive I do not even come close to ND