Our tour guide was Sharon Traeger, and she was amazing! She contacted us several times in advance of our trip to determine our tastes and expectations, and then worked with us to craft an itinerary that would suit our needs.
Our first stop was a quick detour to the Golden Gate Bridge Welcome Center for some photos of the bridge. Then it was off to Sonoma. Sharon was very engaging and informative the entire trip. She had lots of exhibits to share with us maps, articles, etc.. Our first winery was Lasseter Family Winery. Unfortunately, we were a little late for our scheduled tour/tasting due to an accident on the bridge, but we were able to call ahead and inform them of the situation, and they were incredibly accommodating once we arrived, including giving us a little private tour as we we caught up with the rest of the group so that we wouldn't miss anything. The tour itself was very interesting, and the grounds are lovely.
Our next winery was St. Francis, and this was the highlight of the day. We weren't able to schedule a tour here because we didn't book far enough in advance, but our experience just in the tasting room itself was wonderful! The representative who we met was Karen, and if you're ever at St. Francis, make a beeline for her! Super friendly and engaging, generous with the pours, and very knowledgeable. We were able to take a quick walk around the grounds before heading out although we did order a few bottles to be shipped back.
Next, we headed into the town of Sonoma for lunch at the Girl and The Fig. Very delicious! Our final stop was Viansa Sonoma, which had probably the prettiest grounds of the wineries we visited, although I personally did not find their wines to be as good as either Lasseter or, especially, St. Francis. Finally, it was back to San Francisco.
Overall, the whole day was a complete highlight of our trip! My only complaint was that Sharon seemed unsure of the duration of our tour, and then informed us after lunch in Sonoma that if we wished to continue, there would be extra charges. But, we were enjoying ourselves so much, we didn't mind extending either the time or cost.