I would totally recommend going to Napa or Sonoma for some wine tasting! It's only an hour from SF and not only is it some of the most beautiful countryside in CA, but the wineries are incredible! I went with Terrific Tours (www.terrifictours.com) and they actually pick you up from your SF hotel/house. Drive across the Golden Gate Bridge, into Sonoma to 4-6 wineries then back to Sausalito where you get the ferry back to the city. Definitely recommend it!