I really enjoyed visiting Larkmead. They charge $20 for the tasting, but they will show you around the grounds and they give generous pours of all their wines except for the Solari (of which they are sold out), so you can easily share a tasting if you are traveling with someone. Their wines get mixed reviews, high by Parker and low by JL. Personally, I think they are very good wines.
1100 Larkmead Lane, Calistoga, CA 94515 • (707) 942-0167 or (888) 743-7446