Often it's people who haul things, but it can also be animals or vehicles that haul things. When people in Mississippi desperately needed water, these folks in Texas used their truck to haul three pallets of bottled water to the people in need.
Finally, if you carried a lot of things, or if you bought a lot of things, you could call those things your haul. I bet you've gotten an impressive candy haul on Halloween! Maybe you like to dump your haul onto the floor to sort it all out and start nibbling.