- Semi-private luxury tour! The tour might be all Napa Valley, or all Sonoma Valley, or some of both. The guide will spend some time in the first hour discussing the options and taking suggestions. The tourgoers can decide together to go to both Sonoma and Napa Valley, or concentrate on just one “neighborhood”. This usually means visiting from four to six boutique wineries in one day. On the drive north, the guide will fill guests in on the colorful history of California and wine making therein, and the short drives between wineries afford time to talk about the science and art of wine making, and wine tasting, and other fascinating topics.