Last year, we were allowed to remain in our Riverside seats in order to watch the fireworks. I have to say though, I don't think it was the best vantage point to see them. It's a little difficult to see Tinkerbell fly. She's mostly just a green flash going by.
You may be paying $59, but you shouldn't think of it as $59 for a box of cookies. You will also be sitting in a very nice area, you will be able to take in the show from a comfortable chair and you won't have to sit on the ground for hours before the show just to have a good spot. I arrived about an hour before the show, checked in, picked out my seats, went and had a bite to eat and arrived back just prior to show time. Not only that, the cast members made a big deal about my DD's birthday and about 300 people sitting nearby joined in the singing of Happy Birthday to hear and a few other Riverside seating guests celebrating their birthdays and special occassions!
It was a fun evening!