Biscarosse is a lovely spot (look for Navarosse port), out of season you can park right by the freshwater lake, in season there's an aire or campsite. The lake is fab for swimming coz it's only waist deep up to 100m out, then it's very deep for sailing/skiiers etc. Restaurants/shops in town. It's just like being in the Caribbean except there's pine trees not palms; Just south of Archachon on the Landes coast