For our HM, we're doing Hawaii then CA. We're considering San Fransico and/or Napa Valley and have never been to either. We're big wine-os (hence the screen name) so Napa Valley seems logical! We'd either do 4 nights in Napa Valley or 2 nights in both San Fransico and 2 nights in Napa Valley. Does anyone have suggestions for activities in both areas? Is there good public transportation or do we need to rent a car? Any suggestions on places to stay? We're looking at $300 - 400 a night but, of course, the lower the price while not compromising the quality is awesome. TIA