Wow! Thanks all for your quick responses. I'll check out all the links and winery recs.
Right now I have the following wineries on my to see list: Murphy-Goode & Dry Creek but nothing is written in stone.
http://www.sonoma.com/visitorsinfo/S...Winery_Map.pdf
Ami...I have been to Calistoga and the Napa Valley before. I'm concentrating this trip on the Sonoma County area particularly the area between Windsor and Geyserville. It's a memory lane trip. I spent allot of summers and Thanksgivings in the area and since I'll be in San Francisco thought I'd take a day or two to revisit.