Sounds a fantastic idea, further south would attract more of our southern cousins but I suppose you are trying to cater for the guys up here, it will take lots of organizing I know from my involvement with the festival scene what it takes to put on an event I would suggest finding a venue that has some of the infrastructure already in place you'd be surprized how much it takes to comply with all the regs i.e. toilets, emergency access, etc. atleast you wouldn't need to worry about getting the punters towed out of the mud. I have some contacts who could possibly help with litter recycling and believe me there is a lot of it to pick up after an event well unless landi owners a lot tidier than standard festi types. Good luck and great idea I say go for it.