Just got back from vacation. We did a bus trip not a bike trip. We cheated and flew to Rapid City, SD. From there we saw both the Crazy Horse monument and Mt Rushmore.
From there we took I 90 to Billings, Mt. For speed yes other wise it's just another highway. Rain on and off the whole trip, bring rain gear. By far Harley's were the brand on the move. 100 H-D's for every Honda or other brand.
Then we took Hwy 72 & 120 to go down to Cody, Wy. In Cody we saw the Buffalo Bill Museum. Lots to see there. Ate at a place called Granny's. Middle of town right across from a big western store. Food was OK.