Let's see, been to Moab area 6-7 times and can't wait to get back there again!
Arches, Canyonlands Island In The Sky area - just fantastic! Good suggestion above about getting info on best time for photo shoots.
We have hiked all over Arches - way back in. Tough stuff and no more. The hike up to Delicate Arch and the views there are something else. We have gone at sunrise and love that.
Enjoy one of our favorite places - in fact, will be back there again next year. God willing.