Hi Frank,
C-47s can drop vehicle supplies. A C-47 would fly to the enemy island and find a place that was clear of obstructions and drop vehicle supplies in a line, then land. He'd send out the call "I've set up a forward base w/ vehicle supplies. Set me as your wingman to find it".
Anyone nearby who needed fuel, weapons, or repair would type ".wingman chairboy" (or whoever) and see their dot on the map. They'd fly over, get a vis on the goon, then land near some supplies. They'd resupply like the GVs can now, then taxi as appropriate and take off again.