I am considering renting a car in Rome and keeping the car for two days to travel around Tuscany. We would leave from Rome AM on a Monday, drive to Siena and spend the night there, leave Tuesday AM and travel to Volterra and San Gimignano for the day (unless anyone has better suggestions for another Tuscan town?) then drive to Florence that night and check into our hotel returning the rental car that night or Wednesday AM, depending on when we arrive and if the rental car location is open, stay in Florence until Friday AM and onto Venice by train. Does this sound plausible? Does this sound like a good plan or would it be better to just go direct from Rome to Florence by fast train and take day trips by bus to Siena, etc?
I know I need an International Driver's Permit, and I have looked into car rentals from Auto Europe. What would be the best and easiest destination to pick up and drop off cars in Rome and Florence. We can drive stick and I do know about the no car traffic zones. Any advice or recommendations would be most helpful! Thanks!