re: Napa Valley... must do/see?

Pick up a coupon book. You can Get Sterling for 1/2 price. 1st time hit the bigger wineries. Stop in at V. Sattui, get some food from the deli and eat in the basement. Bounty Hunter in downtown Napa is really good BBQ and they really know wine. See the Castle. Have sparkling at Mumm or Chandon or both, really different vibes at each. Take the wine train. Take the beer train.