I had the unique opportunity of meeting two ladies involved with this production and here's what I know that may be helpful:
It is a "tribute", so you're right--it's not the full show. They'll be doing selections from the show "Hairspray" and condensing it into just over an hour, with no intermission.
I also happen to know that there's nothing slated for the PPH during the tech or performance for "You Can't Stop The Beat". That doesn't mean that there may not be rehearsal conflicts, only that there aren't any scheduled performance conflicts (as of yet!).
PS. And if the makeup and hair/wig design is as fabulous as I hear it might be, it will be worth seeing/doing for that reason alone!

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"We're only amateurs because we don't get paid."