Nots 2013, questions from newbies!

[Eileen]

Hi all, a group of friends and I are excited to be attending NOTS this year for the first time!
I have some practical questions about the whole thing if anyone has been there before. If the ticket says doors 9 pm and show 9 pm what time does the show really start? How crowded should we expect it to be? If we want to try to get a table so we can sit occasionally (in out 50's wearing heels) should we get in line outside well before 9:00? Thanks so much!