Hi everyone. I've been reading the boards and this is so much information that I now have analysis paralysis ;)

My husband and I will be purchasing an RV and taking a long road trip (~month) starting in mid June with 2 grandkids ages 8 and 5. I want to travel from Phoenix to Utah (and/or Colorado) to Yellow Stone to Custer SD to Houston and back to Phoenix in approximately 1 month. FYI - the Houston portion of the trip is for a wedding....

At any rate, I've been reading the threads about the Utah/Colorado area and now have analysis paralysis.

I'm going to ask for help, but I should first lay out my 'wish list':
-Places that are interesting to typical 5 and 8 year kid
-Want to stay under 6 hours of driving in a single day for most of the travel days (if possible)
-There are a ton of red rock parks (Bryce, Escalante, Capitol Reef, Canyonland, Arches, Vermillion Cliffs, Antelop Canyon, etc.) but I want to add variety into the trip so I only want to go to 2 or 3.
-Do not want to go to the Grand Canyon on this trip.
-The locations are accessible for an RV to get to (meaning I don't want to roll down a cliff)
-To provide context to my time spent in each area, I feel 1.5 full days at the Grand Canyon are enough to get an idea of what is there. But I think that Custer would be 2 or 3 days (badlands, mount rushmore, etc.)
-It doesn't matter to me whether I go east or north first - I'll simply shift my dates of travel to arrive in Houston on the appropriate date :)

I know it is a tall order... please help!
Janet