One of my Favorite trips was a circle around Lake Powell in southern Utah....My family had explored Lake Powell back in '69 so I had some idea of the country. I wanted to hit all of the NPs and NMs, so I took a map and plotted my course.
Crossed NV via 50 (Loneliest highway in the world) and stayed the 1st night at Great Basin NP in NV. Next day I drove over into Utah and passing Cedar Breaks NM arrived at Bryce Canyon NP. Two days later I drove to Capitol Reef NP (Warning- this is a hiking and 4WD park) and the next day drove up and around to Arches NP- Spent a couple of days exploring it and Canyonlands NP right across the highway. After that I then drove down to Natural Bridges NM, and a day later down through Monument Valley and on to stay at a hotel in Page AZ. The next day I took a guided tour of Antelope Canyon (Slot Canyon).
From Page I drove west to Zion NP, spent two days hiking around it and one day I drove down to the north rim of the Grand Canyon. Then I drove west to Death Valley and up north along the back side of the Sierra Nevada mountains, stopping at Devils Postpile NM.
If you want to do this trip you can reserve an RV in Las Vegas- Smaller is better- some of the roads are narrow and very windy....Especially scary is the "Hogback" on Utah-12...Also, driving around lake Powell hitting all of these parks is kind of like "Musical Chairs" Everyone gets up in the morning, gets on the highway and drives to the next park- and then the music STOPS and all the campsites are taken; Make sure you get a spot BEFORE 4 PM!
Here is a map I made for the Coast Guardsmen when I worked at Air Station SF.....