(WashingtonTimes) - Hopes dampen for 2011 vintage, but visitors, sales still cropping up. Gray Ghost Vineyards has a curious way of building customer loyalty: Make them work for their wine. During the fall, hundreds of customers turn out to help with the harvest. Their reward? The opportunity to buy a case of wine at a 15 percent discount (plus lunch and a T-shirt). “I love wine, and I wanted to see the process in action,” said Kristy Malik, 30, explaining why she woke up at 5:15 a.m. to make the drive from Lucketts to Amissville, Va. “It is hard work,” she said, bending over to place a grape cluster into a yellow bin.