For a second consecutive year, their vineyards have yielded so many muscadines that the Meinhardts will not need to buy grapes from other growers to fulfill the expected demand for hearty red Southern Eagle, peachy Pesca and the rest of the 20 wines they bottle. Today is the last day of the first phase of the 2013 grape harvest at Meinhardt Vineyards & Winery. For a week now, workers have frisked the vines and dropped handfuls of plump, bronze-colored grapes into buckets.