Camp Municipal Entre Deux Vannes 4/5 
Small site, but clean and with reasonable rates. The owner seems a very friendly chap. The surrounding area is not great (it's off a road with lots of industrial outlets/car showrooms etc), but feels secluded with trees and a river that seems to split and run down each side. Relatively quiet for a relatively urban site.
Sens is worth a stop, and you're only about a mile away here.
Simon 2009-04-08