I have biked in the Groges Des Loup area. VG rides. Used the very good VTOPO guide. Bramafan/Plateau St Barnabe was an amzing route, old roman road climb to a plateau then 6inch wide singletrack contouring down and then amazing switchbacks into Bramafan.
The Vtopo guides have always given vg rides, we have ridden the AlpesMaritimes bleu guide and Provence red/blue guide routes.
Although the guide is Blue which is 'VTOPO Alpes-Maritimes Initiés'
and lower level, believe me the routes are up to red/black 7 stanes, drop ofs etc are all rollable, no 'must jump' features.
Thye have proper 1;25k maps with the routes marked as well as text.
http://vtopo.fr/?-VTOPO-Alpes-Maritimes-Inities-
We normally trawl these sites below too.
http://www.1001sentiers.com
http://www.vtttours.com
http://www.utagawavtt.com/