Hi Wes
WE have visited Chatres a few times ,the town center isnt overly camper friendly (its been a couple of years since our last visit ) ,there is a linear carpark along the river under the cathedral N154(pay and display)but the spaces are quite deep at the one end and shaded by trees did an over night there once and no probs ,we have used the spot favoured by the truckers at the junction of the A11 /N154 surounded by hotels and shops but we have used it a couple of times and was ok for a quick stop ,i have been told there are spots by the airport but never had the chance to check them out ,depending on the size of your motor be careful of going inside the inner ring road N154/D24 etc the streets are narrow and steep with a nasty oneway system just to throw a spanner in the works , but the town is good and cathedral is splendid (ask at the desk they do english language tours and tower /crypt walks ) if you want to stay outside the town there are some quiet little villages on the 154 they have now been bypassed and are quiet little backwaters then there are the center comercials on the outer ringroad N123 just depends what you want and the size of your moror .hope this helps
MOS