Hmmm... on my Sept. 2009 tour of the Luberon we made no reservations so that we wouldn't have to be on a particular schedule. Rode as few as 39 miles one day, and as many as 65 another. We would just get into a town about 5pm, find the Office de Tourisme, call the listed gites and Chambres d'hote, and ride out to them when we had negotiated our stay. Everyone was wonderfully cordial and welcoming, even though many spoke only rudimentary English to go with our rudimentary French. It always worked out great, and I don't think we ever paid $100 for a room, save 2km outside of Gordes, where our digs were absolutely stunning and well worth the $105 we paid.