I am in Portland in business next week and have a free day on Saturday and will be by myself. I would like to go to the valley then and was wondering if you thought one of the join in tours is the best way or self guided? I do like to make sure I am hitting great wineries and have done a self tour before and am totally fine with tasting and spitting and being able to drive as I have done that several times in California. I am more interested in tasting to buy or order later, not getting inebriated. But if there was a join in tour that really focused on great wine from smaller producers, I would do that also. Thoughts? And if you have any winery suggestions that fit the bill, let me know! Thanks!