Cormot is OK but the crag has some loose rock so a helmet might be a good idea?
Rochers du Parc is alright. Some parts of Saussois are OK too, not flat but it's a grassy slope, other parts are too close to the road. The beginners' sector in Surgy is good too, flat and open, the rest of the crag ain't bad either overall. (For these three crags expect some serious polish up to 6c/7a. With sometimes interesting bolting and anchors.)
Vieux Château has a flat, shaded base, but there's a river relatively close by (30 feet from the routes maybe? Should be OK and it's a lovely spot). (It's also granite which is a nice change.)