California Ports

[RAD]

My wife and I will be in Napa and Sonoma this weekend, July 8-9. Can anyone recommend some good ports from producers in this area? When we were there earlier this year, I stopped by Heitz Cellars and picked up a couple of bottles of their Ink Grade port, which I've since finished. I'll be back for more from there, but would like to experiment with some other producers.

Suggestions? Thanks--

RAD