Being newbie's to all of this. The Parents Page info says the dress is informal for Friday along with what that means. But, what about Beat Retreat since we have heard that it gets really warm in the gym. Are shorts appropriate?Also, it says that Saturday is casual. Not exactly sure what this means. What do most folks wear to the Acceptance Ceremony since the game follows. In other words what is appropriate for both (shorts, jeans, slacks)? Thanks!