My first boss claimed a record of 84 SOB in his RAF Dakota when flying the Hump in WWII and evacuating the locals in emergency circumstances. I know it's possible, with the conditions he described, ie no seats, err...let's say "reduced" adherence to safety concerns incl staying within MTOW, and a quite low average passenger size and weight, incl children, and no baggage.
But does anyone know of a higher figure?