I'm going to be in Porto for a few days in early October and would like to check out some of the wine estates in the Douro Valley. I'm traveling solo and won't have a car (which is probably a good thing if I'm sipping wine all afternoon...), so I was thinking a guided daytrip might be best. Does anyone have any recommendations on companies that do wine tours? I've found some options from Living Tours and PortoDouro so I'd be curious to hear reviews about them - but any other suggestions are welcome too!
Thank you in advance for your help!