The routes followed for our 2003 trip.  I-10 from Phoenix to exit 303 at Benson east of Tucson, Arizona 80 (once US 80) through Tombstone and Douglas (with a short visit to Agua Prieta, Mexico) and back to I-10 at Lordsburg (on New Mexico 80) to Las Cruces.  Then I-10 west to Deming, US180 to Holbrook, stopping to visit Mogollon on New Mexico 159 along the way, I-40/US 180 to Flagstaff, and US 180 again to the Grand Canyon.  I-17 took us back to Phoenix at the end of the week.