Thank you! We attended the party on Tuesday night but didn't have a great vantage point and spent the show turning my head trying to see all the fireworks!
They most likely will just scan your band to prove you are currently staying at a WDW resort, and you should bring your DVC membership card. I've been asked for it before, and other times just a band scan was all they did....but they CAN deny you access if you don't have your DVC card.