My brother-in-law was stationed at Travis, and I had always believed it was a transportation base .. and when he left the AF, he flew out of Travis on a C-5 to New Zealand.
And .. I was always under the impression that the drone set-ups were in the middle east somewhere. Can’t remember anything more than that.
Don’t know that much about drones (UAV’s) but for what’s on the Military History Channel and the Military Channel, but I did hear once that down in Sunnyvale, in Silicon Valley, there’s an AF station that has a LOT of satellite uplinks that can control UAVs from zillions of miles away... I drove by the place once and was impressed with the number of dishes... many 10’ in diameter or bigger.