We were at Riverpointe 2 weeks ago. There is a cast of characters who runs the place... Definitely do the orientation breakfast and the wine tastings in the evening.
If you haven't been to Napa before, I strongly recommend
Sterling (gondola ride to the winery, GREAT veiw, good tour and tasting)
Castle D'Amorosa- loved the location and the tour, not crazy about the wine
Rutherford Hill for the wine, the tour and the view
Artesa- great building and views, wine so-so. Lovely grounds: Beringer.
Great tastings: Turnbull, Cakebread, Mondavi, Beaulieu Vineyards. Fun atmosphere, good tastings: Sutter Home (who knew!), Via Sattui. Funky but if you like ports not to be missed: Prager Port Works.
Healdsburg square- good tastings on the square, funky atmosphere, great beer at Bear Republic brewery. Further north is the always elegant Ferrari Carrano.
Enjoyed Ledson, Arrowood, Benziger in Sonoma. Love the twisty windy drives over the mountains from Napa to Sonoma or Calistoga to Santa Roas.
Generally when we go to Napa (and Sonoma) we have an idea of what kinds of wines we want to taste, this time was more free form.
Lots of phenomenal buildings, tours, tastings- depends on what you are looking for. Favorite restaurants- Frida's Mexican on Trancas St. Fume' for bistro food. Vermicelli (I think) on main drag through St. Helena- great prices, some of the best Italian I have ever had, and no corkage fee so you can take your own bottle with you.
Have a great time. Except for the fact I am into my second week at WKORVN, I would want to be back there.