I'm currently planning a weeklong trip to Nice and the South of France in Spring 2016. I'm also following this with a trip to Menorca in Spain for another week. In addition to being in Nice for at least 3-4 days, I wanted to explore one or two other towns in Provence as I head west to Barcelona. I was thinking either Cassis, Aix-en-Provence, Arles, Nimes, Avignon or maybe a small hill town.
Is one week enough to make this work comfortably, without feeling rushed?
Are there any cities/towns to avoid along the way?
Are the trains convenient for traveling westward from Nice through Provence?
I would prefer to hire a car towards the end of Provence sightseeing and just drive down to Barcelona because it seems faster and a little more convenient.
Any ideas or suggestions would be greatly appreciated!

