First and foremost THANK YOU to you guys for even contemplating putting on such an event for the benefit of us all. Bit of a light hearted moan though about the 'jeepism'. Like it or not, they were EVERYWHERE during the war, much as they are at shows now!!!. If there is room at base camp, could the jeep owners come and join in, with perhaps a rota of a few jeeps on each convoy each day? Mine for instance, is marked up as 783rd MP Bn, which operated on the Red Ball route, so would look great alongside a convoy of Jimmies.
As for charging entrants, if the event is for 'our' benefit rather than open to the public then of course the organisers can not be out of pocket. Perhaps a public day could offset some expenses? I think we all know the chances of getting decent sponsorship these days.
Finally, personaly I think 5 days may be a bit of a tall order, and quite a commitment for many, disappearing from work/home for 3 days is probably alot easier for most.
I wish you well with organisation, I was at RTV with my Jeep - It was the best weekend i've ever had with MVs.