It appears there is a one-week pass for trains in Provence called Zou, which replaces the old Carte Isabelle. We plan to be in Arles for nine days in October. Has anyone used this pass? Can it be bought online in advance of the trip, or at vending machines? And most important, does it save money? We won't have a car and are planning to take trains from Arles to Avignon, Aix, Orange and to and from the Marseille airport. Can it be obtained at the airport?
A week? I thought that it was a daily pass. It costs 15 euros and is available from June 1 to September 30. There may be something else available but the Zou! pass that I know of is the one described here http://www.ter.sncf.com/paca/offres/cartes-et-abonnements/zou-pass
A Pass Isabelle Famille is still on that link too, at €35 for a family for a day, when I click the "Buy" button. Buying in an SNCF train station seems most reliable.