Starting from San Francisco heading to Bowling Green, Kentucky for a show and then returning via a northern route to see Mt. Rushmore. What I am seeking is suggestions on routes and destinations. We are thinking about starting south and hitting some Route66 but, one car needs to stop in Denver to see a relative. We will be traveling in a 1956 and 1957 Chevy's. Just want to pick your brains on routes and some must see destinations.