BY TRAIN: Trains run directly to Montendre station from Bordeaux, Cenon, La Rochelle and Saintes. Bordeaux in particular is very well connected to the rest of France.
BY PLANE: Bordeaux Airport is the closest to Montendre. From there, take a bus to Bordeaux Saint-Jean station, followed by a train to Montendre.
The festival is around a 25 minute walk from the town centre, or a 30 minute walk from the station. A taxi from each will take less than 5 minutes.