I was a Keycamp kids rep in a previous life and travelled all over Brittany and the Vendee working on various sites. The one I always said I'd go back to I I ever had kids ( and I have and am planning to!) is a lovely campsite called Camping Bel in La Tranche Sur Mer, Vendee. Lovely location on a huge sandy beach, lovely path walk into pretty town, great site with pool. Vendee has microclimate. Rained once in the 12 weeks I was out there. Bon vacances!