There is also Klaus's place at Serres to consider
www.quovadis-aero.com and there are lots of other french clubs in the Alps
try this link:-

http://ffvv.org/debutant-edito/annua...83_06_04_05_84

and maybe
http://ffvv.org/debutant-edito/annua...26_07_42_69_01

On personal eperience I would avoid the CENTRE SAVOYARD VOL A VOILE ALPIN
at CHALLES LES EAUX though.