How to dump piles with a pup trailer, and have the piles actually one in front of the other. Of course, this won't work if you don't have the room to jackknife. You have to put the trailer 90 degrees to the truck or risk dumping the load on the trailer hitch pole (not a huge deal, just a pain in the ass) or hitting the truck tailgate off the trailer pole and dragging the trailer through the pile you just dumped. That is a big deal.