I think your link is old, the Jimtown store closed at the end of 2019. I made it up that way one time, their chilli was legendary. I got dropped on the way up and on the way back. Pine Flat is the most inappropriately named road in California. And it does have a lot of pine trees.
Model Bakery in St Helena (and Napa, and their caboose in Yountville) do good coffee, very good pastries, and their English muffins are worth buying a half doz to take home. Gotta get there early to get the muffins, is the only thing.
At the south end of Napa, Stanly Lane Market have some nice homemade cookies, and also a great bbq.