I am scheduling 5 days in Provence area ( lleaving London via eurostar Sun morning to Marseille, 6 hours! Wont get into Marseille until 3 Pm). I want to see the Calenques so want to set up base for two nights in either Marseille or Cassis. Is it worth the extra hour to get to Cassis on the train from Marseille? The other three nights I have spent in Avignon with days trips to Arles, Saint Remy, Gordes, etc. is there a better base to explaore for five nights? Leaving for Paris Friday.