Actually letting people scan into the park is usually earlier than the official opening time. But then, in each park, the crowd is held further inside the park. Like....EPCOT opens around 15 minutes early, but then holds the crowd up by Spaceship Earth until official opening time (but the Jamminators play, so it's great!). HS will hold the crowd at the corner of Hollywood and Vine and then the crowd is 'escorted' to various areas of the park (TSL, TOT, etc). Of course Main St is open an hour before the official opening but you can only go as far as the Hub/ Castle until after the opening show. I hope this helps.