We'll be in the area for 7 or 8 days in late September. I was thinking about spending the weekends in SF and Tuesday, Wednesday, Thursday in Napa. My thought is that wine country may be a little less crowded during the week. Also, wanted to hit some of the "big boys" in Napa but wondering about the off the beaten path or lesser known wineries where the experience is worth going. I was thinking 3 wineries a day would be realistic, thoughts? Thanks.