We've been to sold out Christmas and Halloween parties and never felt like it was crowded. The parades and fireworks can feel crowded, but if you are staying the whole time, just wait to go on those rides with the long lines. They usually end up 10 min. at some point. Like I said, we've been to sold out parties and still didn't wait more than 10 min. for any ride, and that includes the popular ones. Sometimes there is just a rush for those rides, but if you wait they thin out. Especially later in the night. Now, this year during the Halloween party I think Peter Pan stayed pretty busy (not sold out night) and we may not have ridden it during the party because every time we checked it was busy, but I don't really remember. Usually, they are little to no wait - even when sold out.