I know of the camp site. It is very close to were we go every year La Nartelle.
The camp site is opposite the beach called Elephant. There are 2/3 restaurants very close by. One reasonable priced Pizzas etc the others are on the beach and more expensive.
The beach is sand but you have to cross the road to it. The swimming is safe. There is a place to rent jet bikes nearby. There are also two very small shops around 500 meters from the site but they are only open in the season (July to mid Sept) The closest supermarket is about 5k.