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Have you tried any circus libraries? Milner Library at Illinois State University has one of the world's largest circus collections in their Special Collections and Rare Books Room. I don't know if they would have a floor plan, but it might be worth asking their librarian. If they do, they may be able to make you a scan depending on the condition of the map. They can be contacted at [email protected] or 1(309)438-2871.
Circus World Museum in Baraboo, Wisconsin also has a library, the Robert L. Parkinson Library and Research Center. They might be a good place to contact. Here's their website: http://circusworld.wisconsinhistory.org/Library/AboutResearchCenter.aspx
Upvote:1
I found at least a general description of the layout of a carnival (sans circus) in the Carny Lingo page:
The layout of the typical full-featured carnival was a time-tested pattern >designed to draw crowds all the way through the entire carnival and maximize their spending. The carnival was always laid out in the shape of a horseshoe.
It does not include a circus, but my guess is that it would go either midway in an extended horseshoe, with gate facing the arch or just opposite the arch.