One point worth bearing in mind is that former fighter/bomber fields may not have the ACN (Airfield Classification number) i.e load bearing strength (not forgetting runway length) to take large AT aircraft, particularly with a load and lots of fuel to go somewhere half decent.
Sure you may have seen AT aircraft, once upon a time, operating from e.g.Coltishall or similar, but that was usually for a Families day type scenario - very light loads and little fuel. Similar for aircraft arriving at such bases to offload, say troops from a nearby army base - the vast majority of the fuel and, therefore, weight, is gone.