Hi, My name is Marianne and my husband and I will be taking a trip in April. We fly into Vegas and pick up a small RV there. I think we're pretty comfortable with the RV so I'm looking more for route suggestions. We've got 22 days and was hoping to do a loop (L.V. to Zion, Tetons, Yellowstone, over to California (Redwoods, Yosemite) and back to L.V) I am beginning to think that is a little ambitious. So... Any suggestions on what are Must Do's? I have seen Zion, Bryce, Tetons & Yellowstone and would love for my husband to see them all as well. Neither of us has ever been to the west coast which is why I wanted to do the loop. Another question is camping - approximately how often will we need full service sites? I've called a few KOA and if their open, they are filling up fast. I know there will be a ton more questions but those are the top of the list for me. Thanking you in advance... Marianne