By Lenn Thompson, Editor-in-Chief Harvest season is always bustling and fun on the East End of Long Island, but this year there is another (though expensive) reason to get out there — HARVEST, a wine auction and celebration of Long Island's East End — to benefit the Peconic Land Trust and East End Hospice. Organized by the Long Island Merlot Alliance and Long Island Wine Council with support from the New York Wine & Grape Foundation, HARVEST is happen September 24-25 at Wölffer Estate Vineyard in Sagaponack and at local vineyards on both forks. It's a bit of a complicated…