I think your going to have to build a system to help incentivize the Bitcoin Aspect to your Carnival. I believe a system similar to Dave and Busters or Boomers will help you build proper revenue from small time stuff like what your more or less offering. Something like Allowing Fiat as well as Bitcoin but offering a significant discount for using Bitcoin only. Maybe a 40% markup?
doesnt have to be discount.. could be something like "queue jumping", or front row seats for shows, extended ride times. bigger teddybear prize for knocking over all 3 tin-cans. etc etc
making bitcoin feel more of a VIP currency rather than a less valuable discount voucher