Things I would do on a return trip...
-Spend more time in Kanabe, UT (Moqui Caverns, Peek-a-Boo Slot Canyon, The Great Chamber)
-Gunlock Falls Park
-Visit Zion in the Summer and prepare for the crowds - Actually getting into the Narrows
-Moon Overlook and Factory Butte (by Capitol Reef)
-Bentonite Hills, UT
-Pack a lunch for Arches
-Horseback or Carriage ride in Bryce Canyon
-Explore Vernal, UT (Jones Hole, Moonshine Arch, Fantasy Canyon, Red Canyon Overlook, Red Fleet State Park, Echo Park, Whispering Cave, Ute Mountain Fire Tower).