Just returned from 8 days in Napa-Sonoma and had great time...my recommendations:

1. domaine carneros-great grounds and pinot noir
http://www.domaine.com/

2. mumm winery-free ansel adams pics in art gallery and great restaurant
http://www.mummcuveenapa.com/

3.chateau souverain-most beautiful grounds and restaurant
http://www.chateausouverain.com/

4. j winery for wine tasting-ratafia dessert wine is outstanding
http://www.jwine.com/

5. peju for sculptured gardens
http://www.peju.com/home.htm

6. clos du bois for cab & art
http://www.closdubois.com/

7. coppola to see his oscars and tucker car
http://www.niebaum-coppola.com/site.php

8. mondavi to see start of modern day winery
http://www.robertmondavi.com/

9. st supery for art and gounds
http://www.stsupery.com/

10. ferrari corano-exquisite grounds
http://www.ferrari-carano.com/

This was my first trip so list not complete but I think I did well..,any comments?