Silly question, but do you have any Bleu Sud tickets already?
Reason I ask is that very few people seem to be camping there this year, I'm guessing there are a lot more organised groups taking the place over this year, like the Lotus 7 club did last year.
The Lotus 7 group were there year before last and seemed to have a big camp. Just really liked the vibe of the place as it as not as big as other sites.