Whilst in that area,I recommend Apremont with its chateau that from time to time has firework displays from the 'battlements and in the turrets.Also there is river that is dammed with beach and hire of all manner of floating things ,sailing dingies,canoes,pedloes etc,boule,picnic area,toilets loads of parking and free except for of course boat hire.To eat try the Cafe du Paris at Notre Dame de Riez,be warned the meal takes a long time with many courses.