We had a great day with "Tac" (Terry), our guide! He was REALLY knowledgeable about the area, and about wine and wine-making. And he was truly responsive to our needs, e.g. riding pace, and desires, e.g. skipping the third winery-tasting after lunch, and biking around the area instead. In addition, the company was really willing to work with us when we had to change the date of our tour because of the Calif. wildfires. We'd book with the company, and ask for "Tac", again!