I think its the first party and a Friday so probably busy but you can try calling the reservation line and asking the CM if they've sold a lot of tickets or if they expect it to sell out. Going by what I've read here I think you can expect it to nearly or completely sell out. We'll be down there at that time but decided to do San Diego Zoo instead since the park closes early anyway and no general admission fireworks good luck to you and no matter what - enjoy! Just more costumes to admire
Thank you all for your information. We will go expecting crowds, but any day is better in disney then at home. Pulling the kids out at lunch to take them. Our flight arrives at 4pm. Let the party begin!!