We went to la Serignan Plage twice when DC were younger, around 9,7,3 ages.
We had never been camping before, we stayed in one of the wooden chalets,Cabin Robinson, the 'tree house' the kids called it. It was lovely. A double bedroom, then a room with big bunk bed and a roll out trundle underneath for little ones.
There was a dishwasher, microwave, hob, fridge freezer etc, living area, lovely outside space with hammock, and we arranged to have a gas BBQ too-you pay extra for this, not much though.
It is like a little village in itself, right on a nature reserve and on the beach-a lovely sandy, golden beach. Oh, you get bikes with your cabin, we hired extra so we all had one-your DD will have a seat on the back. So you can whizz around. Lovely shops on site, a supermarket, butcher/deli and the most amazing bakery/patisserie and a fruit/veg shop. There is a fruit/veg stall out on the main road too that we used to cycle out to.
Footy pitches on site, table tennis, water fountains to splash in, a mini market, entertainment if you want in the evening, a restaurant-which also does a take away service, pizza/burgers etc.
Swimming pool with 2 small water slides.
My lot loved it, we went two years in a row. They had great freedom to cycle about go to the shop alone etc, very safe.
We did horse riding locally, and visited lots of local towns, Beziers was gorgeous and Serignan on market day was lovely.
I met a lady in the laundry room one day and she said she had been doing the campsites in the south of France for 20 years and she thought this was the best one!
Here.