Very late to this party, I know, but for what it's worth, I think you answered your own question in your original post! RSC will be more familiar for your audiences, and to date, this show has been our highest earning show (which might be because we threw 40+ elementary students into the mix with our 18 member high school cast).
The MUNY version is wonderful, but it is different, doesn't have any of the familiar lines as the movie (which, depending on the sophistication/expectation of your audience, could be a good or a bad thing). I personally would have preferred to do the MUNY version as it WASN'T like the movie, but I also thought pragmatically that my students and my audiences were more than likely going to be miffed if they came to see 'The Wizard of Oz' and saw...well, not quite what they were expecting.
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Phillip Goodchild
Theatre Arts Instructor/Assistant Department Head of English
National Board Certified
Ruskin FL
Original Message:
Sent: 12-13-2015 11:00
From: Rob Juergens
Subject: Wizard of Oz: RSC or MUNY???
My decision was based on choosing the one that had "King of the Forest". I couldn't imagine doing Oz without it.
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Rob Juergens
High School Musical Director
Windham ME