Sounds like a nice idea, I hope you pull it off.
Myself and a friend just spent a few days in the woodland at
Glyn Y Mul Farm. We had bad luck as the camping trip we had planned for months turned out to be exactly when the servre weather/flooding happened, but we went anyway. The site was lovely, I wont go into detail because there's enough on the
site, but I can tell you Ian (the owner) is a very nice/helpful and informative person, I should imagine he will be very helpful and will tell you a hell of a lot of the stuff you need to know. He told us a few things about how he ran his site. I can say he is a very busy man through the summer, well he was when we were there, so probably spending a few nights there would be a good way to sit down with beer with him when he's got the chance.
They're very self-sufficient on the farm, they have their own water-source that they purify, they have a turbine for elecricity. I think its good that they have both fields for your normal campers/tents/caravans and woodland, I would recommend that. Ian was fine with campfires even on the field area's however it had to be in one of the half-keg things, so it didnt ruin the grass everywhere.
When we went up the woodland got flooded and we had to abandon camp at 6am with streams starting to flow under our hammocks, lol, and retreated to a tent up on steep/well-drained field, it was the worst weather since records began, just our luck for our well planned trip! lol. There's a few shots at the site on my gallery:
http://www.ashleycawley.co.uk/bushcraft-2007/index.html
The second half of the shots are at the Summer Bushmoot. Good luck with your plans and let me know when you've got your site up