In reply to alanbill99: I have stayed in camping les marmottes a few times in recent years. It is between Morzine and Les Gets in a small place called Essert Romand.
I don't know how it compares to other campsites in the area having not stayed in any of them but I found it really good. The showers and washing up facilities are always in good nick and the pitches are nice and big. The isn't anything in the village other than a pizza stall but its a short ride down the hill into morzine where you can access the uplifts/shops.
There tends to be a mix of familys and bikers, usually with a fair few brits. The camp site owner is a decent chap and speaks good english. I just reserved a pitch by sending him an email a month before I was due to arrive as it can get quite busy.