It is up to Brian as to how big he wants the event. The current area that I have earmarked for camping will comfortably hold 8 - 10 tents and trucks but if the event grows bigger than that then we can either park the trucks in a different clearing in the woods to the camping or set up in a different part of the farm altogether.
When we have held Land Cruiser events there we have had 40+ vehicles and tents.
Ian