When I was younger they paid a dollar per bale(load and unload)...
I woudl so do it for some extra money!
on edit, didn't matter how many people. If we had 5 people, and moved 500 bales, that was 100 dollar per person. I always drove or stacked, but that would take a good days work . The people that hired us every year said they don't pay by the hour because we would get lazy.