We don't get any Californians here ... not that I've seen. Your recommendation is excellent !Yes I know, but also many amazing bargains, and the scenery is to die for!
I live 10km from the Sonoma County line, and <30 minutes from the closest Napa vineyard/winery.
At the wineries, most of the better quality Sonoma wines are rapidly approaching $50-60+ a bottle. Napa is much worse, with $100 75cl bottles the norm.
Some of the local wines are less expensive through other channels (like Costco) - but they are generally pricing themselves out of the market (for me, at least).
I would much rather spend $33 for a Chateau Haut Boutisse Grand Cru from Château Palais Cardinal - the 2018 is lovely!
Less expensive ... Cru Bourgeois rather than Crus Classés, still high quality ... and, if on a budget, Pécharmant from the Bergerac region (e.g. Château du Rooy), just south of us. Worth trying on your next visit to La Belle France ! Santé !