Also agree 100% .. with the exception of a typical small arms force (SMALL ARMS WEAPONS and AMMO) (usually with hi-tech ground to air missile defence capabilities) whose primary role is protection of the base but specifically the aircraft. But i'd go beyond that, speaking from experience (Ex-RAF) .. With the exception of multiple mechanical/engineering i.e. groups who's functions include maintaining runway (BUILDING MATERIALS), comms (TECH PARTS), Air Radar (More TECH PARTS), Medical facilities, (MEDS), auxiliary vehicles (Different VEHICLES, FUEL and PARTS), although primary role is keeping aircraft airworthy (Hi-TECH PARTS and Hi-TECH WEAPONS) and 100% fighting capable. A very large proportion of an airforce base is administrative in nature and this IS typically looked over or neglected, another very important aspect of any airforce base is that it is a "static" military base, requires virtually no detachment of it's personnel (apart from pilots in the air). Therefore all personnel AND their families live in either houses or barracks (HOUSEHOLD ITEMS) inside and/or in very close proximity to the base, and all facilities for such a communities are also present to meet their requirements. Air-force Bases by their very nature attract civilian communities (like a magnet! Just as regular airports do, sometimes more) for local employment and servicing of base including all facilities needed to run such a large place. On the Air-base itself there would require to be recreational facilities such as airmans, sargeants & officers Mess/Bar (including canteens/restaurants) (FOODS/DRINKS) and their single accommodations (CLOTHING/GENERAL ITEMS) (those not married / with families) bowling alleys, swimming pools, gymnasiums, outdoor running tracks, football (baseball) pitches (have worked on U.S. base). The list of recreational facilities could go on, Cinemas, Churches etc etc. Then there are the support facilities hair salons, banks, but believe it or not ... the one most important facilities on an Air-base (to the occupants that live there) are the shops! (FOOD/GENERAL GOOD/DRINKS/TECH GOODS .. etc etc).
Airports, military or otherwise are essentially a micro-cosmopolitan that would/should be any apocalypse survivors 1st port of call.. although i'd guess that a military one would just be a bit more difficult to gain entry into particular (sensitive) areas. Even if personnel abandoned the base.. those secure buildings would be looked up tighter than your grannies handbag! :)