In reply to coco.nymph:
Crumbs - you could be in for a lot of walking. The climbing area around Font is massive. There are a few places within walking distance from Fontainbleu itself, but they aren't much to write home about. Nemours similarly has cheap hotels with the odd one or two places within reach. Finally, there is the campsite at Milly la Foret that has most of the Cul du Chien and associated areas within easy walk. But getting to Milly won't be easy unlike Font or Nemours.
Of course there is always hitching which should be feasible given the number of fellow climbers in the area. It will certainly be an adventure for you, but I reckon most of the adventure will be in getting to places... and then back again, rather than the actual climbing. Do you not have a mate with a car?
Good luck!