Omni, you wont really have to. Only on those desert nights does it get really cold. I was born in Arizona, I know the area really well... Have you left Vegas and seen the beauty that lives outside that shithole of a city? You should drive a few hours southeast and hit some of Arizona, its beautiful. Flagstaff and Sedona are wonderful, there is a little city south of Flagstaff called Jerome, it is on the side of a mountian and looks as if it were from another world. There are old mines you can explore, be careful they can fall on you, but shit its so cool! You can find your soul out there...