Water bottles and canned goods mostly. I did find 9mm shells in one of the tents with dirt/earth as floor (come to think of it, earthen floored tents were the only structures that spawned anything), also the quonset hut with the usable door contained food, clothing, helmets, and ammo. Overall, void of interesting loot, at least for now... Also noticed military vehicles and pickup trucks aren't spawning loot anywhere...