We are flying into SFO on July 15, renting a car, and staying at Napa River Inn. Have booked reservations for Platypus Wine Tour for July 16. Have a tour of Hendry on the 17th and also want to do a tasting at Cakebread and Clos Pegase. Other than that, no definite plans. Can anyone offer suggestions for anything else we shouldn't miss? Also we have decided to go spend the night of the 18th back in San Francisco so that we'll be closer to the airport for our morning flight out the 19th. Any suggestions for hotels in San Francisco? We're thinking Union Square looks like a good area. One other question--would it be worthwhile for us to go return our rental car on the 18th when we go back to San Fran, which would mean a trip back to the airport and then catching BART back to the hotel. Parking looks to be expensive at hotels, but if it's a big waste of time to try to return our car early, we don't mind paying for parking. Thanks in advance for any suggestions!