We are going to the Vendee this year to a site near La Roche Sur Yon. We'll be travelling from Caen to Rennes then Nantes and on to a site near La Roche Sur Yon. The roads we're thinking of are N814 A84 N136 N137 N844 A83. Refueling can be a problem so I've heard, access seems to be a problem with some filling and we have the added problem that one of our party is using LPG. Are there any decent accessible filling stations on our chosen route?