Stop worrying about it and get r dun !....you'll wonder why you were fussin'... it's an easy drive. Stop in Holbrook, (KOA) then toad it over to the Petrified Forest and the Painted Desert. Go into the Petrified Forest SOUTH end and you'll traverse the Park and come out on the NORTH end which is the south end of the Painted Desert. If you have the time, a day trip to Four Corners is interesting. You can be in four states at the same time. While in Holbrook, see the Wigwam Motel in downtown Holbrook, (CARS fame). Ask to see inside one of the TeePees. Stop at Meteor Crater for an interesting stop. Stand on the corner in Winslow AZ, (Eagles song) then into Flagstaff......Dennis