Opinions / Advice needed--S Dakota to Yellowstone

[john59]

Need your opinions / advice. A good route towing our 5r from the Black Hills in S Dakota to Yellowstone. Staying at the Yellowstone W Entrance KOA on Rt 20, where Idaho, Montana and Wyoming alsmost touch.

Good route meaning 'NO Killer Grades'. Willing to go 5 + hours outside of a direct route.

NO ! ! ! ! born2fish (Frank), I LUV YA BROTHER. Outside does not mean coming south to Tennessee and back north.

john