I live in Sedona and we get much colder than you guys over the winter. I just blow out my lines with an air compressor. That makes it easy to take for a weekend (or longer) without worrying about de- and re-winterizing. I haven't bothered with any antifreeze anywhere. I have friends in the Phoenix area that never winterize and haven't had any issues.
Tim, Tara and Canyon - 'TnT' (& C now...)
2015 Thor Outlaw 37LS w/FJ Cruiser Toad
Columbia 400, 1967 Corvette, KTM 350 EXC-f, TTR 125 LE, XR50 for toys