I know of this place there are a few Natyrist sites here BUT there is also a Yelloh Village

http://www.eclipse.co.uk/samwise/francesouth.htm Review here 10th down the list
But all these campsites are in the Med area

http://www.leserignanplage.com/accueilgb.html Is the commercial site of the campsite

there is also the wonderfil site
http://www.lescampingsdefrance.com/anglais/departement.php?DptID=

Sandie,
Went there a couple of years ago; very nice site with plenty of room & an excellent pool complex, although one of the two pool areas had terracotta tiles that were like ice when wet ( so thats a bit of a stupid idea whoever chose them!). The mistral had just finished blowing when we arrived ( mid august) & this had made the sea uncomfortably cold !! ( about 15 C.....colder than Atlantic off Cornwall in summer !!!!!) but, I guess that was just unlucky; Site is very good, especially for kids to roam, beach is fine sand & gentle slope into sea, local area not bad , Sete worth a visit & cycling along the canal du midi a good thing to pass the time. Beziers also V interesting ( especially the Cathedral).
Would go direct with Yelloh village as they have the best accomodation for the money.
Cheers
Mitch