Hi-Will be traveling from Atlanta to Las Vegas in early November. Never been west of Wichita. I am concerned about running into snow anywhere, but specifically in the mountain areas (Flagstaff). My mom (75 years old) and a girlfriend will be with me(probably all of us fit somewhere in the 'wuss' category!) Being a 'sea-level' type of person, I am worried about what we might encounter. I wanted to take I40...but, because of my concerns, would it be best if I took I20? Thanks for any info. Jeanne