Flew one many, many years ago but I hasten to say briefly - the owner sold it a few weeks after I checked out in it. Lovely aircraft with very nice handling.
I still have an owners manual here bought at a car boot sale. 60 gallons or 90 with aux tanks burning 14.1gph (US measure) at 75% and 12.7 at 65%. A quick look at my W+B figures suggests that four 170lb adults and full fuel (60g) would take it near MAUW - but I've got this down as 2800lb whereas the handbook says MAUW is 3100lb. I can't explain my lower figure.
Keep the gear well greased - I've seen three Comanche's belly land with gear stuck up or partly so. That's over 35 years though..
I'm sure there are real PA24 drivers who can give you hard rather than book figures.