Well, looking at the pdf version of the operating hours schedule, it looks like those three days are usually closed for the transition between fests, so I think having a non-1880s themed 3-day event works fine, as it's advertised for a specific crowd (younger people/thrill ride fans). So it isn't like there will be a bunch of people coming there and being disappointed to find that the shows aren't running and what-not.
My sister and I are already planning a trip for the event!
~ "Becky" Joy ~