So I submitted the event to Nuke-Con. In honor or Rick Loomis, I'm going to be running the most recent version of Buffalo Castle, using the T&T Deluxe rules. I'm going to modify it to accommodate multiple characters and the use of magic. (The original adventure was a solo designed for a warrior PC.) I've titled the event "Return to Buffalo Castle."
I haven't actually run any T&T since the summer between 8th grade and 9th grade, and it was 5th edition. I own a signed copy of the Deluxe Edition that I ordered (via DM on Twitter, no less) in late 2015. Time to dust that tome off and print out the PDF of BC I bought from DriveThru.