We will be driving MH from AZ to Wis summer of 2012. The trip there will be direct, but on the return trip we want to take our time and see some places we have not been. Would like to show the kids Mt Rushmore, Yellowstone, any other suggestions? Preferred route? Preferred stops along the way? We will have our 4 youngest with us, 11, 9, 6, and 3. We will take about a week or so on way back, so not an extended amount of time to zig zag. Highlights would be great. Thanks!