Zion and Bryce are not that far apart if you can get them both in, other places that are memorable to me are Pink Sand Dunes, Grand Staircase Escalante, staying in Grand Canyon at El Tovar, the lightning at night was amazing, and then waking up to sunset on the rim was phenomenal. We took a 1700 mile road trip 10 years ago, went in a big circle. It was a great trip.
Have a blast,
Ellen