@tollah – Chatel is generally quieter than Morzine/les Gets. We found the blues fluid/rocknroller/etc great fun (the blues have some decent sized red flagged jumps inc a big gap !) also the red air voltage which is a short ride around the road from mid station was deserted and excellent. The pump track was also deserted.
The Col du Coux/Arette Berrois trails (as per thread above) were good and although other riders were on them it soon cleared out.
@andy the top section of the path is OK for riding you are supposed to turn off half way to avoid the reserve.
Note the small restaruant/farm at Lapisa is really lovely. You pass by this on way to Col du Coux and other stuff.
Morgins trails are excellent and generally very quiet. Just have a look around.