Hi,
Perhaps you are already aware of it, but you may want to spend some time at the URL below because there is some Censuses available for Ste-Catherine and St-Gabriel Valcartier Quebec :
http://www.genealogy.com/users/c/o/p/Janice-L-Copeman/index....From the same author see also :
http://www.copeman.accessgenealogy.com/It may help or it may not.
Good luck,
Esther