Actually you know what. The more of think of this the more I think it is a fabulous idea. Imagine running out of fuel and being able to land somewhere. Have a squaddie drive you a jeep with some fuel fill her up and then take off again on the uneasy terrain and make it back to base. It would get especially interesting if this was all attempted with enemies looming or even enemy tanks around.
I do think however, that a jeep fuel reload should only reload you 25% fuel regardless of how many reloads you get. For example, if you land at a spawn, a jeep should not be able to reload you, end sortie, spawn reload you again. 25% cap on it.
Either way I see no reason why a jeep shouldn't be able to refuel an airplane and it would add nothing but fun to the game which is a big +1 for me. On top of that, it would not be very difficult to code. Probably some writing involved, but pretty basic concepts to add this into the game.
+1111