Flagstaff, AZ in November

Although snowstorms can blow through Flagstaff during November, they are short-lived and rarely cause hazardous road conditions that aren't cleared quickly. Temps for Flagstaff that time of year will dip below freezing but not by much, keeping an eye on weather for the region prior to departure would allow you to plan the best time for travel. Alternatives would be to stay a bit south of Flagstaff, maybe Sedona or Camp Verde. December and January would be more risky for RVing but November should be doable.