NAPA, CA - OCTOBER 1: A field worker with the vineyard management company 'Vinewerkes' carries a bucket of freshly picked merlot grapes during a night harvest for Artesa Winery October 1, 2007 in Napa, California. Wineries in the Napa Valley are in the midst of harvesting their 2007 crop, a year that many are predicting will be a stellar vintage.