What route? Your weather could be quite different depending on whether you take I-25 down to I-10 then I-8, versus going across I-40 to either I-15 or I-17.
Go south first, and your first stop could be in a place warm enough to dewinterize, i.e. somewhere around or past Tucson. The southern route is only about 30 miles longer than going to I-17 and then down.
Also, sometimes when moving a RV, we get fixated on having to live in it during the trip, and that is not necessary. It is barely a day and a half, you can go winterized all the way, stay in a motel the one night. People who deliver these things don't live in them enroute.
