I am at Malmstrom AFB right now.. As for the carshops question, it depends on what your asking. Most bases have an Auto Hobby shop. Its a facility with everything you would need to do your own maintenance/mods/rebuild/welding/painting or what have you. Here at Malmstrom our unit is like 20 bays and five of them have lifts. Three drive ons and two chassis lifts.. Sweet gig really. Stall rental is a buck fifty an hour for a flat stall and 2.50 for a lift stall per hour.. all ther tools you could dream of.
There is usually a garage run by AAFES as well, but screw them usually.. they are lazy bastards.