I haven't slept there because I live nearby but I know the place well. It is pleasant enough, just next to an access road to the horse race track (nice little track with a few meetings a year, worth a visit), and near a group of boulders - St Germain, blue, yellow and orange circuits. It's a level, cleared bit of forest on sandy ground, no problem for tent pegs or flooding, but thats's it. No facilities, not even water I don't think, so you will need a water container of some sort. Nice spot, but it is just that, a bivouac
warning - something big walks through there at night and makes a noise like some kind of hell beast . . .
Petit Bois is a very good area, classics like ... big dragon
You wish to come with animals : YES NO