I went here last year for 2 weeks, with my little sister (9) and parents, I was then 15 years old. I found it very nice, especially because I had made friends which I could go to the lake with and play games. It is very cosy, on a morning you can get delicous bread! Only the sanitary facilities were not that great, I find. Because you had to wait very long before you could take a shower! And also very dark in those showers, but well I still had a nice holiday there! Each evening things are organised, such as sumo-wrestling, karaoke, playing table-tennis games and that kind of stuff! swimming pool finds I, however, disappoints, but well there is supergroot nicely more!
We also walked much around the camp-site and lake. There are signs with routes which you can follow, and at one route you also come by a small cute village, fontenu! (look on google earth in the area of doucier there are not many cities (the nearest large cities are Besancon and Geneva), but nice villages with for example caves (not a must for children, haha) daily shopping you had best get at SuperU (in Champagnole), which is not that far away. There is also an area with water falls near, which we almost walked, almost, because it is sooooo far away, but it is very beautiful.
Last year really was the best holiday ever, I will go there again!