I just got back from a 9 day trip to Custer State Park in the Black Hills. We went out I-80 and up thru Waterloo, Iowa and caught I-90 near the Albert Lea, Mn. 2000 miles round trip. There is a lot of flooding in Iowa and Minn right now and a lot of state parks are closed out there.
There are a ton of places to stay out there depending on what amenities you are looking for. We have a Roo and stayed in Custer State Park (electric only) but great camp sites. I was not overly impressed with the Hill City area but a lot of nice areas around there.
I pulled the Roo with my Trailblazer which is within weight limits and never felt unsafe, but pulling that big sail behind me into the wind I got 7.5mpg on the way out there and 11mpg on the way back! I am now shopping for a pickup to have more power that my Trailblazer can put out.
The Corn Palace is good although we did not stop this trip (seen in in 2000) and Wall Drug is OK. A lot of junk but good doughnuts and 5 cent coffee! The scenic drive in the Badlands is spectacular and it was interesting to camp there for a night. We stopped at the prairie dug-out as well and the Minute Man missile site is near the same location.
There is a lot to see in the Black Hills. Check out this website for planning ideas Black Hills & Badlands - South Dakota | Home of Mount Rushmore
. I went to Jewel Cave which I would highly recommend. There is construction on the road going on out there right now so there is a little delay driving there. The tours are first come first serve so be prepared to wait an hour or 2 between purchasing you tickets and going on the tour. The hiking is great and the scenic drives are amazing. Be sure to plan your route as there are roads that will not accommodate a vehicle wider that 8'-4" and some of the turns are very sharp.
I made good use of my surge protector while there as one night during a thunder storm at Custer State Park. All of a sudden the power in the camper went out and I noticed that we were the only ones without power. I went out and checked and power was getting to the surge protector but not the trailer. After a few minutes, the power came back on so I believe that the surge protector did something to protect the trailer.