My wife and I will be visiting in April and wanted to take a day for a wine country tour. There appears to be a multitude of tours available, which confuses me. Do any of you fellow Chowhounds have any tours you recommend for visitors? Any caveats about choosing a tour? We'll be staying at a B&B in the Castro, but can leave from anywhere as we'll have Muni passes. Thanks for your help!
Bob in Seattle