As you might have seen me mention on Twitter, today I started running the classic (1995) 2nd Edition AD&D superadventure Night Below for a party of three 3rd-level PCs, consisting of my wife's paladin, my bard, and a character my son made, of a class we've been working on designing for fun. So it's a little weird to be adapting it for only 3 PCs, when the original adventure is intended for four to eight ("the higher number is better").
I started this project because gaming with my son, ever...