Frank Sherlock was fabulous! He was very knowledgeable about San Francisco history and knew his way around Napa - a real pro! I will recommend him to any of my friends that plan a trip to wine country.
A very hot day - over 100F - buy very interesting and enjoyable. Surprised that wineries charge so much - 20 plus for tastings but appreciated that one of them did take the charge off if you purchased a bottle of wine - seems sensible business to me., Also with a long day tasting plus some wine at lunch not included in the tour cost though! sharing a tasting flight with your partner is sensible but some wineries do not allow this - pity!!
Frank was very helpful, fun, and accommodating. Although he does drive like a maniac. Most of the really good small wineries require reservations so we could only visit one from our list.