Hey Rhino,
The best areas to camp, hmmm, last year we arrived quite late on the Thursday and there was not a great choice left. A large section of the campsite was taken up by regimented danish tour company tents, and another large section was taken up by the Porsche owners club. A definate no, no for camping however is anywhere near the bottom toilet block as the ground round there was as hard as nails. We camped up near the track end of the site last year (about 30 yards in), the ground was a lot softer and there was a bit of shade from the trees.
The section taken by the Porsche owners club at the far end of the campsite is probably the best area though.
Cheers
Jay