In reply to raliadsa skcalbwah:
Loads of good areas. I think the best guidebooks for getting around and finding problems are 5+6s and 7+8s, but there are more photos in some of the other guides that might help with inspiration. Other guides also needed if you want to do circuits.
Some of the crags have sandy paths to walk in along which might be very hard work on a bike. There is still loads to go at though. And there isn't much that is impassable with a pushchair (my son was also 8 months the first time we took him.)
As a family I'd recommend looking for a place to stay in one of the larger villages/smaller towns with some shops, bakery, cafe etc. Milly la foret, Barbizon, Chapelle la Reine, etc. There are lots of other good places tho.
Post edited at 14:50