Going to Wyoming...

Plan it so you do take 90 into Rapid City SD. Mt Rushmore is right there and the Black Hills are beautiful. Then head west into Wyoming and check out Devils Tower en route. I'd by ya lunch at Humphreys or Los Compadres when you come through Gillette but I'll be out of town riding the aforementioned Beartooth Highway and Chief Joseph Senic Byway on my bicycle that week. Continue on to Buffalo WY and you can select from a few awesome routes there. You can drop down through Yellowstone and go to Jackson before turning back east to go into Dubois. Let me know if you want any info on the Rapid City area and Wyoming.