Last year's road trip was a success (From New York to Wyoming via I-80 and Wyoming to New York via I-70), thanks to roadtrip america. This year, we're planning to fly to Las Vegas from New York then drive to grand canyon, zion, etc with some side trips to LA or San Diego, Ca. We have 12 days to spend. Can you please suggest best routes, where to stay and what to do. Also, what can you say about renting an RV. By the way, there are 5 of us, me and my husband and our 3 teens. Thanks.