It was free if you got to the train station first thing in the morning and inquired about riding the Lilly Belle. If they were planning on running it they would write your name down on a list and give you a time to come back later that day. They could only take about 10(?) people. It was a round the park trip and the conductor told us all sorts of stuff about the train and the parks. Totally free, not a club 33 member or even an annual passholder, only requirement was that you had park entry that day so you could be at the Main St station to sign up. I did it a couple years ago I think, I don't know when they stopped doing it.