What's your budget, and what are you looking for in a winery? Big or small, high-end or reasonably priced, great food or just a cellar door, ...? Are you planning to drive yourself or join a tasting tour?

I usually took my visitors to TarraWarra (mediocre wine, but the best views in the valley and a nice free art gallery), Train Trak/Zonzo (OK wines, great pizza), and De Bortoli (nice tasting room, lots of choice, reasonably priced), but there are dozens more. The tourist bus brigade usually beeline for Chandon (Moet's rather industrial-sized Oz operation), but if you can time your visit to avoid them, the champagne tasting is quite nice.