There is a camp site in les gets, its up the hill from the town similar to Marmottes. Takes a while getting back up the hill but part of one DH section finishes just along the road, so you can get the lift up ride down and save a tug up at the end of the day.
The downside is that its up a hill in the alps, we were planning on going into town but after a long days riding sacked it off and slept, the toilets and showers are nice and the whole site is relatively quiet with a nice atmosphere for a family.
Not too expensive either, I’ve travelled most of Europe through campsites and if memory serves me it was 24 Euro a night for three adults, a tent and a car parking space on the site. Bloke who runs it doesn’t speak much English but he’s laid back and doesn’t like a hassle, he likes the noise kept down of a night too so should be good for kids.