I agree, it is there problem to solve, and they will work with whatever I send them. I'm just trying to make it go as smooth as possible.
This will, most likely, not proof at the printer. Most likely, it will proof (wet-proofs) at the repro-house that is doing the scanning. The art is a scroll (probably 20' long) and it being captured using a large format flatbed scanner (Cruze). That said, the single page idea sounded good for proofing purposes, not to mention internally for copyediting/PDF sharing, etc.
Design wise: the art has a pattern that runs the length of the scroll, so the 13 side by side pages would be ideal for ensuring the art lines up.
Lastly, I did put the 10 page max question on InDesignSecrets.com and David replied that 10 is, in fact, the max. Thanks, Pdan, for the suggestion.