One more note - you could drive to Larkspur or Sausalito and take the ferry to the SF farmers market that is held on Saturdays in front of the Ferry Building and on rear plaza with views of the Bay. I copied text below from http://www.ferrybuildingmarketplace.c.... They offer fruits, vegetables, herbs, flowers, meats and eggs from small regional farmers and ranchers, many of whom are certified organic. Also regional artisan specialties such as breads, cheeses and jams. The Saturday market also has local restaurant vendors. It is renowned throughout the country as one of the top farmers markets to visit.

The Marin County Farmers' Market at the Civic Center in San Rafael is a must for killer produce, fresh juices, flowers and artisan products. Kid-friendly and a wonderful way to spend a Sunday morning. Maybe a 25 minute drive from Agua Caliente. Go early (I think it runs from 7:30 to noon) you will not be disappointed. The "farmers market" on the Square in Sonoma is not very good! It consists mainly of food truck vendors and craft/art items and little in the way of produce, flowers or artisan food items. There is a wonderful Whole Foods a few blocks from the Square and better than Sonoma Market on Napa St. Basque Boulangerie Café near the square has great artisan breads and baked goods. Absolute best breakfast is at The Big 3 (in front of the Sonoma Mission Inn) or the Garden Court Cafe and Bakery in Glen Ellen. Favorite restaurant in town of Sonoma is Le Haye. Have a great trip!