Make sure you have cases of water with you. South Dakota is a Beautiful State. If you are going to Mt Rushmore, go to Crazy Horse, Needles Highway, Custer State Park, Black Hills. You drive from LV, Nevada to Salt Lake City, UT. Be careful of all the traffic. Use Hotwire.com for hotels. Stay on the NE side of the city. Drive from Utah to Casper, WY. Stay in Casper. Drive from Casper to Rapid City, SD. Get a hotel. Be careful, there is high heat and you must have lots of water and food. Things are few and far between. Not much cell phone coverage. Have an Atlas.