We have 7 days to spend between Biarritz and La Rochelle during the summer. We are thinking of staying in a chalet in Lacanau Ocean, but undecided whether to spend 7 days there or 5 days there 2 in an airbnb in Biarritz? Any recommendations? We are already booked in for 1 night in a hotel in Biarritz. Should we spend longer there? We are 4: 2 adults & 2 children.