We just went on the 4th of July Fireworks wagon ride. It was $8 for adults and $4 for kids. We were surprised they did not charge more for it being a "special" ride. For anyone there on the 4th of July, I would highly recommend going. It was fabulous!
All wagon rides are done first come, first served. They do not offer any ressies for them. The sign that was up said they leave nightly at 7 and 9 pm.
Have Fun!