Help trip from Ohio to Yellowstone Mount Rushmore Blackhills

We have multiple families that plan on RV’ing from Dayton Ohio to Mount Rushmore, Yellowstone, and the Blackhills in June. I have tried to find someone to design the trip but can’t find travel agents that do this ;) We have never been and plan on taking approx 2 weeks. We plan on driving there as quickly as possible, and taking our time for site seeing once we get there heading through the sites and towards home. Can you please give us ideas on where we should stop 1st, best sites to see, and how many days to see in each? What we absolutely don’t want to miss and if you have suggestions on where to stay “RV parks” along the way etc? We want to see and experience as much as possible. Thank you!!!