By Bryan Calandrelli, Niagara Contributor Whether you are a wine geek who can differentiate the sub-appellations of the Loire Valley or just a happy-go-lucky daytripper winding along a New York State wine trail, you’ve probably experienced cabernet franc. Long Island got me hooked some years back and I know I’m not the only one who marches up to tasting bars and skips ahead to this variety. Luckily for me, the Niagara USA region is starting to realize the potential of cab franc too as its young vines begin to produce. And, if you’re a cab franc lover planning a visit…