There is another 'graveyard' near Tucson. Just north of Tucson is the town of Marana. The Marana airport is operated by Evergreen Air Center. There is a great deal of Federal activity on the airport and there is a large anount of security in the area. To my knowledge there is no public tours of the facility. Also at one time there was a 'graveyard' at Kingman, Arizona. Most of the aircraft there are regularly cut up. The folks up there are a little more laid back even when there are aircraft there.
Have fun.