Well, there are many places in AZ that have aircraft stored. Here are some of the bigger ones:
1. Davis-Mothan AFB (Tuscon, AZ): Aircraft Regeneration and Recycling Center (Graveyard). I have never been on a tour but have stood in awe outside the fence. Military aircraft for as far as you can see in all directions. PIMA AIR AND SPACE MUSEUM is a must visit. It is only a few miles away.
2. Pinal Air Park (Marana, AZ): I was denied access by a security guard. I don't know if you can set up a tour or not. There are MANY commercial airliners. Many many 747s, DC-10s, L1011s, etc. I would guess about 100 aircraft.
I dont know anything about tours, but these are the big places I know of. The Pima Air and Space Museum is a great place to visit.