Don't focus on what not to miss, accept that as a fact given the time limitation many things will be missed. This forum will grant you a list as long as your arm of things to "not miss."
Research the area, online and at your library. See what speaks to you. Put that on your list and explore it well.
One week would scratch the surface of either of the National Parks right out Moab. One week could be the LaSalle's.
If wheeling or rock crawling is a passion, check into what guide services are operating that time of year... I don't think an airport Rent-A-Car place would allow wheeling with their 4wd suv typical highway vehicles.
2013 KZ Sportsmen Classic 200, 20 ft TT
2020 RAM 1500, 5.7 4x4, 8 speed