Hi Jo,
Did this trip a couple of years ago although our itinerary changed for the 2nd week as it was when the American Government shutdown resulting in the closure of the national parks
Mount Rushmore & Crazy Horse are amazing and I loved Yellowstone as we saw everything (Bears, Elk, Bison, etc).
Monument Valley was a must see for me as a western fan, loved it.
Its a great trip but you do cover a lot of miles so expect early starts, the 2 night stopovers are a godsend when they arrive.
We missed Bryce and Zion but fortunately I'd seen them on a previous holiday, lets just say some great photo opportunities.
Any specific questions please ask.
Mick