In April, I am visiting my younger sister, who is studying abroad in Florence. After Rome and Florence, we'd like to travel around Tuscany for 4 days to see some smaller towns, but are unsure where to begin. I've already been to Siena and San Gimignano, and she will have visited both by then as well. I'd love suggestions on an itinerary, whether we should stay in a villa vs. a hotel, and whether we should rent a car or travel via public transportation. We really don't know where to start with a trip like this. Thanks so much!