We are traveling from Cinque Terra to Siena on a Sunday in March and I'm looking for a town for us to stop in along the way. (We will do Pisa on the way up.) Would it be reasonable -- without a car -- to train it from La Spezia to Lucca and then bus or train from Lucca to Siena?
I just posted a similar query on the Tuscany forum to see if Volterra or SanG is possible. Bus service is hard to figure out.