At least an hour before it start
At least an hour before, however we found that the back/side of the crowd has the best view. We we're dead center and ended up heading toward the back and having the best view of everything.
Doors open an hour before the show. You'll probably need to be in line an hour or so before the doors open to get a decent spot.
I'd guess at least an hour or two before the doors open.
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