In another year, the lawn of the Lamb Building in Amagansett would have been filled with East Hampton Town residents enjoying free clams on the half shell and clam chowder on Sunday, courtesy of the town trustees. But though the 30th Largest Clam Contest could not happen in its typical form this year, the trustees found a creative solution for the annual celebration of the town's maritime heritage and informal seminar on that body's role in town government.