Napa is the furthest regular town on this site, at the outer edge of the sixty-mile radius, and it is the one place where the honest answer includes "you may not need me". Napa has an established pickleball scene with several experienced local instructors already working in it. If you want a weekly lesson twenty minutes from your house, one of them is probably a better fit than a coach driving over from Sonoma County.
Where the drive makes sense is for something specific: a video analysis session, a focused block on one part of your game, a partner lesson where you and your regular doubles partner want the same message at the same time, or a small group splitting the cost. Those are worth arranging. A casual half-hour is not.
The practical constraint in Napa is light. Both main public venues are unlit, and one of them carries posted rules restricting private instruction without approval. That narrows the usable window more than it does in Rohnert Park, so Napa bookings are planned rather than spontaneous.