A few photos of our visit to Cornerstone Gardens in Sonoma, CA in May 2010, along with a short summary of our recent visit to Napa & Sonoma.
Here is a link that might be useful: Napa & Sonoma, CA
It sounds like a good trip- the weather has helped make those back road drives just lovely this year.
Your photo of the agaves, grasses, and poppies is wonderful. I have an agave, so I can appreciate the weeding issues in that bed.