I'm new to Chowhound but already love it--you guys gave me some invaluable tips for where to hunt for and eat white truffles on my vacation in the fall. Now I need some follow-up advice. I'd like to make truffles and porcinis the focus of my trip, with visits to San Giovanni d'Asso, Citta di Castello, and Gubbio. Gubbio is the only one of the three I have visited, and it's certainly worth a three-day stay, but I don't think it's good home base because it's a bit out of the way. Last time I didn't rent a car, and the trains are great but not to get to these out-of-the-way places: I took a bus for an hour to get to Gubbio. So this time I want to rent a car--but I don't relish the idea of driving in Florence. Any recommendations about where to rent the car, and which town to make my home base? Or is a home base an unworkable idea--would it be better to just drive from truffle town to truffle town, staying a couple of days in each?