Yeah, we just got 8:05 for out trip. That seems to be the earliest. When the park opens, we think that you can go all the way up to the ropes, like you can wait by the castle behind the rope there.
No you are not made to stay in the restaurant...You can go out onto Main Street but they have barriers set up so you cannot access any of the lands until the park opens...Getting a picture on Main Street when it is empty before the park opens makes for a great backdrop....We always take our picture first thing, eat at 8:05, every one must go potty before leaving CP, then we wait by Adventure Land for it to open...
Only once did we sit at 8:05 and we did not get out before the park openned...The characters took extra long coming around that day
Last trip we had 8am ADR at Crystal Palace. We got thru eating at about
8:45. We hopped on the Train and rode it around to the back of the park and got off at the Toontown Rear Entrance Rope. Only a few people were there.
When the rope dropped we walked right into Toontown Judge's Fair with no waiting and saw all of the Princess and got Photopass picks with each one.
This is especially great with young ones that want to see the princesses and the kids were able to play at that small Goofy's playground while we waited.