I'm there, will be arriving on Wednesday evening or Thursday morning.
Not really into camping though, as I've got lots of photogear, laptop and other stuff with me ... I'm looking into hotels right now, and trying to find something within a reasonable distance from the track. I know my way pretty well around the 'Ring, so don't mind to drive a few km's on and off to a hotel.
There are several campsites around the track, this map shows them :
http://adac.24h-rennen.de/Accomodation.217.0.html?&L=1&cHash=f6a7d1bb2f. If you want a good spot, be there early. Last year I went for a drive on the Ring on the Monday before the race, and some were already setting up camp then. Popular area's are Brünchenn (show up early for this one, Wednesday may be too late), Schwalbenschwanz (inside of the small carroussel), Breidscheid (lowest point of the track, near Adenau) or at the back of the GP Strecke (not next to the track as all the other ones). Accomodation is poor, if there is any ... just some mobile toilets and that's it; also one of the reasons why I prefer a hotel instead.
BMW is having an M-festival (
http://www.m-power.com/_open/b/varlink2.jsp?lang=en&sNr=1), but not really worth the money for me (and I'm driving an M) ...
If you've got any questions ... just shoot !