If anyone has been following the WDW opening, it seems like they announced that the boarding groups would not open during EMH, but then they went ahead and opened them early, which caused some complaints, but might have been the best solution for the massive crowd.
People out here are crazy, so it’s not all that unreasonable to think that someone could stagger out of Trader Sam’s at 2 a.m.… then just wander over to the main gate and get in line! At that point, it’s only a few more hours until open, right?!