What if the vehicle bases had a re-arm pad, as well as an ammo bunker and a fuel bunker off to the side somewhere.
If you destroy the fuel and ammo bunkers, the re-arm pad becomes useless?
This way if your flying by with your squad and are low on fuel or ammo, and know an air raid is coming to a V-Base, you can land re-arm, and meet them head on.
It would also shorten the front when air fields are more than a sector from the front line.