I know this post is a little old, but I was in Napa in March, did the wine train thing and I make my own wine! Anyway....lots of people love fruit blended wine like blackberry cabernet, or blueberry pinot noir, raspberry merlot, etc....You could always do a custom blend with that. I know for white wines apricots and honey were a big focus.
As for the actual smell of wine country....I don't recall anything since we were there right before the big season. It is beautiful though.