Movies.com's staff asked several hunger games fansites to input on the premier dos and don'ts.
"Theresa of Down With The Capitol
Do: Get to the theater early. Lines start forming anywhere from 5 – 18 hours before the film is due to begin. Not everyone can spend that much time at the theater, but at least plan to be there a good 2-3 hours in advance. You might consider contacting your theater to see if they know when you will be allowed into your screening. Many times, if a midnight showing is popular, theaters will cancel 9pm showings to allow patrons a chance to be seated early. This helps them to keep overcrowding due to lines down to a minimum and is a benefit to you as you’ll be able to find your seat and relax until showtime.
Don’t: Scream or squeal loudly while the movie’s rolling. Yes, we are all excited for the film, but screaming whenever Peeta or Gale appears on screen is not going to earn you any points in the arena that is the theater.
Midnight Screening Must Have: A blanket, preferably a Hunger Games one. This is necessary for two reasons – to keep warm and to cuddle up with when you are either on the verge of tears, or already have them streaming down your face.

Savanna of Hunger Games Fireside Chat
Do: Chat with the people around you in line and in the theatre before the movie starts. Get to know some fellow Hunger Games fans! A midnight screening is the perfect opportunity to connect with other Tributes in your area and hopefully meet some new friends who are just as obsessed with the trilogy as you are.
Don’t: Get angry at and snub moviegoers who haven’t read the book. Just be thankful that they’ve discovered The Hunger Games in some form and encourage them to read the books as soon as possible!
Midnight Screening Must Have: A shoulder to cry on. Even if it belongs to someone you just met. You’re going to need it
More advice after the jump…

Tanvi of Hunger-Games.net
Do: Dress up! As the character, I mean. It’s always fun, and you’re so sure to make new friends. If dressing up seems a bit too much for you, you could also simply wear your mockingjay pin. Over the years, as a Harry Potter fan, I’ve met such great people dressed up as the characters – it was impossible not to go talk to them and I’m still talking to a lot of them after all this time!
Don’t: Repeat dialogue, scream or generally create a ruffle. Everyone’s there to enjoy the movie, and trust me, it is really annoying to have someone’s voice carrying throughout the theatre.
Midnight Screening Must Have: Have a camera or a smartphone to snap pictures. You’re sure to bump into someone dressed up as the characters. It’d be great for the memories; this is our first movie, fandom!
Adam of Hunger Games Fireside Chat
Do: Go with people who live on an Effie Trinket time schedule, so that when you’re inevitably late like I always am, they’ve saved a spot in line for you. Also, absolutely eat and go to the bathroom before you get to the theater (especially ladies. Sorry, but men’s bathrooms are usually a lot quicker.)
Don’t: Sit there comparing the movie to the book scene by scene. That never ends well. I made that mistake when I went to see Deathly Hallows I and couldn’t help myself from focusing on all the differences. That’s why I think it’s good not to read the book too close beforehand. You want the movie-watching experience to be pure and fun.
Midnight Screening Must-Have: A sweatshirt or jacket that you can take off or put on easily. They jack up the AC in a lot of these theaters, so you might get cold. If they don’t turn the AC up, all those bodies can make it pretty steamy."