off soon to les sables-d' olonne but not to sure of which route to take,normally from calais we take a16,a28,a29 over the bridge at honfleur,a13 to caen ,a84 to rennes,n137 to nantes then on to les sables de olonne.but it has been suggested that from calais we head to rouen ,n138 to alencon, a28 to le mans,then head down to le sables d olonne . has any of you good people tried any of these routes.....thanks