Sutter Home (Hwy. 29, St. Helena) is also a favorite stop. The tastings here are free and very generous. Reserve tastings do cost extra, but we were trying to get the most out of the free tour. Yes, this shot is out of focus. Not my fault.
The Napa Trader Joe's at St. Helena Hwy. 29 & Trancas St. Two buck chuck is really two bucks in California. EDIT: Now its $2.49 :-(