An interesting idea but surely the only place to park away supporters Coaches is at the Designated parking area adjacent to the Railway end. So to carry out your plan, the away supporters would be dropped of at the Railway End and would then walk past the Kop to the Tilton or the Coaches would drop off at the Tilton and then park on Tilton Road or make their way before and after the Game to the parking adjacent to the Railway end. I really cannot see Plod agreeing to any of that and in the words of the Kaiser Chiefs....
I predict a Riot.