The recreation board may employ a county or municipal director of recreation to be its executive officer. The director, with the approval of the board, shall employ such staff as may be necessary to effect the recreation program determined by the board. The salaries of the director and the staff shall be fixed by the board. The tenure of the director and the staff shall be at the pleasure of the board. Traveling and other expenses of the director and the staff while in performance of their duties shall be provided for by the board.