Reservations are recommended. The museum is about 20-25 minutes from Rio Rico. Near the missile museum is a huge open-pit copper mine. There are dump trucks that hold something like 300 tons, and other equally impressive equipment. Again, I think reservations are recommended.
Tombstone is the epitome of a Western town and is a popular tourist destination.
Don't miss the diorama. Tombstone is about 2-3 hours from Rio Rico. Bisbee Bisbee is an old mining town not too far from Tombstone. Very interesting architecture, and an underground tour of the Queen mine that is great fun. Reservations are needed for the mine tour.