Mojave has a lot of stored aircraft, but I don't know how accessible the ramp is to visitors. Davis-Monthan has mostly stored military, the tour is necessary as you cannot see all from the perimeter.
Marana Air Park probably has the most airliners in storage, but is VERY offlimits to visitors, as there is but one road leading up to a guard post. Without official business you'll be turned away. You can't see much from the airport fence.
Tucson has cleaned up some of the old airplanes that were sitting on the west side.I think some went to the museum. There are some stored airliners, and some undergoing maint and/or mods at Hamilton Aviation on the west side at TUS.