We will be flying into Vegas mid May and renting an RV. We love adventure. We plan to hike.. hoping to hike the Narrows, bike, horseback ride, cayoneering in Escalante, whitewater rafting in Moab. Most interested in Zion and Moab areas but realize 10 days is not quite enough for the entire loop. I'm thinking of 3 nights in Zion, 3 nights along route 12 and 3 nights in Moab, then drive the freeway back to Vegas in a day. Any suggestions or advice? Other route suggestions? Am I right in my feeling that 10 days is too short for the big loop?