Moab is a great, central place to stay for a couple of the key parks: Arches, Canyonlands. Most highlights in those National Parks are "road kill" (car accessible), and there is quick access for pre-dawn/sunset shots from Moab.
A drive down to the south part of Utah and Monument Valley is worthwhile, as well as staging in Page AZ for a few days. Antelope Canyon is nearby, as is access to Grand Staircase/Escalante.
Then one could stage near Bryce Canyon/Zion.
There is SOOOO much to see that one should focus on what one seeks most, and spend a quality session(s) there.