Harvard's Dramatic Club will hit the boards again this winter, after a long summer layoff. With the cooperation of V-12 authorities, the Club will produce a series of one-acters for Unit, and may give a full-scale production if it can get the necessary manpower. Big Tree, the swimming pool clubhouse behind the Grant Study will be open again Thursday, as H. D.ers greet stage-struck civilian and V-12 candidates with beer and cokes.