Hi from AZ. . . Some great suggestions, hope your trip is a month or so !:R Many of these choices need several days to do them justice ( Cadillac Ranch, maybe 30 minutes :W) The snowbirds will still be in AZ, so plan ahead. Also, get to Big Bend NP before Spring Break hits, it's packed then (mid March I think) Cool area though, Fort Davis was great. Another tip, if you're not going to go "below the Rim", GCNP needs about 4 hours. That's for a good overview of the ditch. If y'all are hikers, double the time in a lot of these. Now that we live out West we're trying to see them all, as we can ! regards & safe travels