I haven't been to the southwestern part of the U.S., and I don't know much about the parks there (other than the fact that I want to visit the famous ones). If I go, what would you recommed seeing? Where to photograph? I'd probably be interested in seeing rock that is especially colorful. Best times of day? How to avoid tourists? Any special photographic techniques? If I could only visit a couple (likely on any trip I'd make), which ones first? (Would the arid landscape give me a "dry" sense of humor?) Thanks.