I'm not sure if it's totally ECO, but the organic winery in Rattlesnake (Ten Spoon) is having their annual harvest party this weekend.
(From the website at
http://www.tenspoon.com Harvest Alert!
Oct. 14, 15, 16
Come help us with our bountiful harvest! Join us for an hour, a day, or all three to help pick and celebrate. Lunch, snacks, brews, and wine provided. Don't forget to bring your scissors or pruners! Thursday, Friday and Saturday 9am-5pm (starting 10am on Saturday)