It sounds like it could only happen on Christmas cards: a parade of horses and buggies circling a snowy village green. But Woodstock Wassail Weekend is an annual event in picturesque Woodstock, Vermont. Carolers serenade townsfolk and everyone gathers for the lighting of the town tree and Yule log. Historic homes and farms open for celebrations of rural and small-town holiday heritage. You may have to pinch yourself to believe the charming New England spectacle.