If you want Flagstaff in August you better make reservations now, the entire north rim is packed all summer.., what all these idiots saying boycott AZ forget is we get the lions share of our tourism each summer from France, Germany, etc., and they all hit the Grand Canyon and spend the night in Flagstaff, in addition the people down in the valley spend weekends at their summer homes or hotels in the Flagstaff area, there is normall a wait to get into any of their restaurants and good luck on a hotel room.
I really like Prescott. Does it get as warm there in July and August as it does in Phoenix and Tuscon?