Whip cream with sugar and vanilla until stiff. Spread wafers with part of cream, sandwiching them together to make stacks of 4 or 5. Then sandwich the stacks together, standing on edge to make one long roll. Frost outside of roll with remaining cream. Refrigerate at least 3 hours. Decorate with shaved chocolate or with cinnamon candies or red candied cherries and holly to make a festive yule log. Cut diagonally at 45° angle to serve. Rolls may be frozen, if desired. Remove from freezer to refrigerator about 1 hour before serving.