Have you tried the Camping Cheque website http://www.campingcheque.co.uk/en/ - offer lots of sites on the Cote d'Azur, and for a couple with a caravan and electricity a pitch costs only
GeorgeB,Malcolm,
Try looking at this thread, http://www.ukcampsite.co.uk/chatter/display_topic_threads.asp?ForumID=7&TopicID=116262&PagePosition=9&ThreadPage=1&ReturnPage=Search&search=&searchIn=
As for avoidiong the tolls, if you're in no hurry thats fine, but if you only have 2 weeks, bite the bullet & use the toll (peage) motorways, you'll find them so relaxing, hardly ant traffic & you can maintain a good average speed, average speed of 50 - 55 mph is not unusuall.
BTW the site i use is L'Etiole D'Agens in St Aygulf
Dennis,We have stayed at Caravanning Esterel, Agay (near Frejus) twice. It's great. A busy site but by September it will be much quieter. The pitches at the bottom of the site overlook the Esterel massif and you can watch the wild boars guzzling on old bread (which you give them!) as the sun goes down and you enjoy that bottle of local rose. Some pitches are pretty small, but this is probably the case with all the Cote D'Azur sites, so ask for a big pitch - this should not be a problem in September. A great place.