Wayland, having visited the site I can answer some of your Q's
The main camping site is nearly all coniferous. There is some broadleaf at the edges but as far as I can remember its thinned out and the older stuff is mostly old beech, so not ideal for sleeping under. There is also an old flint mine down that end (fenced off)
The parking is about 50 metres from the woods, no distance at all.
There's normally a big pile of split logs and cordwood on site and at the xmas moot there was other smaller dead stuff about as well.
On the oposite side of the road to the camping site there is another piece of woodland that is part coniferous and part broadleaf - again, at the xmas moot we were free to have a bimble round this, forage if we wanted etc - not sure if the situation will be the same at this moot.
I'm just gutted I can't be there