I think cafes are open late, at least during PBP, and they can be quick if they want to be. Also, boulangeries are open early, as are patisseries. Small groceries are pretty nice, I'm a little intimidated by the idea of stopping at a Carrefour or the like during the ride. I figure I will stock up ahead of time though. I made it through 2011 because I stopped at the grocery in Sezun and got some chocolate.