The wife and I have spent many weeks in that area in the last 10 years with friends and relatives living there. We've always had a great time. We prefer Sonoma over Napa for expense reasons. A visit to the Castle winery in Napa is fun. This is a real castle from Europe that was moved brick by brick to Napa and rebuilt. Takes about 2 hours to go through it on a tour, and the wine is served at the end in a tasting room/gift shop. Be aware that if you take the cheaper tour, you'll be ignored by the the host at the wine tasting for those who paid higher tasting fees. The Charles Schulz museum in Santa Rosa was fun for Peanut fans. We were there in Sept./Oct this year, and got to watch gray whales feeding in Bodega bay, at the Bodega head. This was a rare treat for us. Even our local host hadn't ever seen gray whales at Bodega Bay. We like to go to the smaller wineries, and have found some of our best wines here. Dress for colder weather, as this time of year, it's cold at night, and warmer during the day, if the sun is out. We took a boat from Catoosa to San Francisco, and walked the wharf. Be ware of well dressed pan handlers. They look wealthier than I did, and I would complement them the fine Italian belts, or shoes then had on, and declined their request for money. We've always had fun in wine country, and have met some really cool people.
At the Very Least, Work Hard, Do Your Best, Know the Truth and the Facts and Always Be Honest!