Go down through Burgundy and spend a few days there - some nice sites - Lac de Panthier at Vandenesse has good showers and toilets, a lakeside beach, two pools and small waterslides, but it definitely is not 'HAVEN'. Grappe d'Or at Mersault is also recommended, or Village des Meuniers just a bit south at Dompierre des Ormes. I'd then suggest somewhere south of Lyon, perhaps Camping Bontemps at Vernioz, or somewhere in the Ardeche (lots of sites to choose from) - around Vallon Pont d'Arc or Ruoms is good for plenty of sites to choose from. Some nice sites, too, around the roman aqueduct at the Pont du Gard.
Carcassone - we stayed at Le Martinet Rouge at Brousses la Villaret - smallish site, nice, friendly owners, about 15 miles north of Carcassone. There's also Domaine de Arnauteille which comes recommended, and is to the south of Carcassone, but we haven't been. Then I'd go back up via the Gorges du Tarn - some lovely sites in and around Millau (Les Rivages, Val de Cantobre for instance) or Riviere sur Tarn (Les Peupliers or Peyrelade), then up the A75 and perhaps another stop around Vichy in the Auvergne where Camping Le Filature at Ebreuil is also highly recommended. Further north again Camping Pierrefitte in the Sologne is also a site I'd go back to - although it's several years since we were there.
Some of these sites are quite big, but not the loud type sites you associate with Haven in this country - haven't really come across that type of site in France, even on the largest all-singing all-dancing type!