We are planning a Napa trip for my honeymoon in October, and I am hoping to stop by Lake Berryessa. I have always been fascinated by the Zodiac case, and have read all of Graysmith's books about the subject. However, I have been unable to find a map or directions pinpointing exactly where Zodiac Island is located. If any of your Napa travels has brought you to this area, I would appreciate some directions. I have not had luck with any of the search engines. Thank You