I'll leave the course discussions to others, though golf in this region is somewhat limited in quality, as most of us are well aware.
If you want a real wine adventure and a unique, imtimate setting to taste and see wine production...Robert Kennan Winery is your ticket! The highest winery in the Napa-Sonoma area, the place is the bomb. Understated, unhurried, with the best Cabs, dollar for dollar, in Northern California. They also do an excellent, un-oaked chard and several other varieties that generally hit a high mark.
Call ahead, ask for Laura, and she'll set you up. I'll always remember her great line to me when we arrived there for the first time, after having a bit of a time finding the place, "Yeh, when you come here you're either lost...or on a mission!" How true Laura, how true.
You will not regret making the effort to visit this winery. It has very few peers.
Cheers,
Kris