Over here, flew jumpers back in the late ‘80s in a 182. The only maintenance that the club paid much attention to is whether the hotwired car stereo and zip tied speakers in the gutted cabin (without seatbelts/tie downs) were sort of intact. I had to wear a chute, (no cushion on the seat pan, no reserve), but nobody ever told me when/who repacked it.
My checkout (briefing) was to climb at maximum rate to the prescribed altitude, keep things level until all of the jumpers exited, and then do my best to beat them to the ground…
It was fun, but I didn’t know better