Del Dotto or Pine Ridge
Pine Ridge. The wines are good at both but they feel extremely overpriced at Del Dotto (not that Pine Ridge is cheap).
The whole atmosphere at Del Dotto felt like a tourist trap, honestly -- the "cave" was loud and crowded with too many groups; the "barrel samples" are for wines you can buy now, not futures and thus not real barrel samples. Maybe since we went at the end of the day it seemed like most of the guests (and our tour guide) were drunk and obnoxious, and when the winery blasted rock music near closing time, it didn't help. Sure you get a slice of pizza, some breadsticks, and a piece of chocolate but whoop de doop.