Just got back from a week in Cham staying with the guys at Arctic Beaver. If there's a group of you heading out then I totally recommend these guys.
Catered or self-catering, its covered. I went catered and everything was awesome. The guys will come out riding with you if they have time, so you get to ride some sweet spots you'd probably never find, they'll have everything sorted for you for when you arrive (lift pass, equipment etc) you get picked up and dropped off at the airport and to and from the slopes each day...
I honestly can't say anything bad about my time with them!
Arctic Beaver Ltd
Chalet Holidays in Chamonix, France
www.arcticbeaver.com
info@arcticbeaver.com
tel: 00 33 621 85 41 31