Helicopters and cars on AF-1 !
Since you get to see the area below the main deck whenever you get on the back of the aircraft I can speak with some confidence and say that I have never seen a chopper or car down there. The area contains cargo, comminications gear and general 'stuff'. The helicopters and cars (and sometimes boats) come on either galaxy's, starlifters or globmasters and usually it takes several to bring them all.