Yulilin3 gets us the inside scoop.. she has access to what is called THE HUB, for disney employees.
She posted this information in the very first post on this thread:
"DHS opens from 8am to 10pm with Fantasmic! at 9pm during SWW (unofficially it opens around 7:30am)"
So that is pretty much gospel for times. I did notice last year exactly what she said about unofficial opening being about 30 minute earlier, it's because so many people get there at park opening, between those that waited for celebrity FPs and those that just are coming into the park they start letting people in (up the the rope where the show will be) just to get folks through the turnstiles.
Keep an eye on the very first post of this thread, as Yulilin3 gets info she will update it
All praise Yullin

hip hip, hooray!!!!! She and many others on this board/thread were my life lines last year for my first SWW and let me tell you that is why I am back following this thread this year.... and why last year was so much fun I am going back again!

I am HOOKED!