One group that I worked with had assigned each board member with an area that they were responsible for. One was in charge of costumes, one the props, one the house, one the stage area, etc.. Each of these had to manage their area. So the costume board member controlled the keys to the costume room and who had access. New show and new costumers were lent a key set for the duration of the show only. Similarly the board member in charge of the house had their own list of house managers. The board member was in charge of making sure there as a house manager on duty. This ensured that someone is in charge--and not the director of the show.