We stayed there for 3 nights just before the Frenc...

We stayed there for 3 nights just before the French and German school holidays started. The camping site is well organized, clean and pretty safe. The staff is very nice and welcoming.
Reception opens at 9.30 and upon check in you get a code that allows you to access the campsite with your vehicle. We've been there backpacking and without a car, which was no problem as buses to Arcachon and La Teste de Buch stop literally at the entrance of the campsite.
We stayed in a mobile home, which was far better than we expected. Nothing special, but very clean and cozy. Kitchen equipment was provided in abundance.
There's a bar, a restaurant, a supermarket, a playground with a kindergarten and a swimming pool.
The restaurant is really nice and offers some pretty decent meals. Additionally there's a food stand for take aways. The supermarket is nice, but as you might expect not the cheapest.
The dune itself is astonishing and by far the best thing about the campsite is, that you can climb the dune from the there.
All in all we really enjoyed our stay there. 100% recommend.