I can only assume its going be be extremely complicated and busy, so I'd implore you not to expect otherwise.
1) Don't be that d!ck that leaves during curtain call or, Lord help you, before the end of the show. Chances are people will be lining up well before then.
2) The smart move I try to use is to go as far down the barricade as people go, and just fill in from there in a line along the barricade. That way, you are up at the front and don't permit the sneaky passerbys to push their way in around you.
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