Consider going thru La Crosse WI, southern MN, and into South Dakota. Drive southern SD towards Rapid City. Stop and spend time at Badlands NP. While in the Rapid City area, go see Mt. Rushmore and Crazy Horse. Drive south and see Fort Laramie in WY, reputed to be the most important frontier post to keep the Oregon Trail open. Drive south to Colorado, then west into Rocky Mt. National Park. South to I70, then home to Indy. This trip will be a blend of history and nature. Might even see some elk and moose in RMNP. I can't tell if you have only a total of one week available or one week camping available after driving. Whatever you do, have a great time. Bob