Don't bother for North Napa Valley
We purchased the PWP with intent of using the wine pass for the Calistoga, CA area, there were a lot f Google reviews out there about it. Unfortunately, it looks like all of the wineries in the area do not participate, as an example of the following- Joseph phelps winery, Chateau montelena, Tee Vine, Schramsberg winery, I am sure you know the rest...basically a waste of money. Girard is the only one in the whole area.