I was just there and I know the CM's do sometimes provide incorrect information. The show was offered only on Friday-Sunday, although I don't know if they will add shows for the holidays. There were no fireworks when we were there at the end of October.
We had balcony seating. Your seats are based on when you purchased your tickets, not when you show up. But there are only 21 seats and it's not very crowded. While it is better to sit in the first row, there's nothing wrong with the second row. The second row allows you the opportunity to get up and move around easier. Since I was sitting so long I actually enjoyed being able to stand up and watch parts of the show. When you sit in the balcony there is a dessert buffet available. If you arrive early, there's a place to wait inside by the entrance to the balcony. But there's really no need to get there more than 30 minutes early since they don't start seating until then and your seats have already been determined.
They also offer priority seating on the ground. You get dessert in a box rather than on a buffet. In this case seating is determined when you check in. But there are only 50 seats so getting there very early is not that important.
Make sure your tickets are for the balcony, not the priority seating on the ground. For those who call and the balcony is full I would still recommend getting the priority seating on the ground. You get a seat and a reserved spot and you don't have to stand for hours. Enjoy. Tom.