If you want to stack your fire wood directly from your dump trailer, or dump truck,here is a handy hint.
Chain the tailgate up about half way, dump the bed slowly until the remaining wood will just slide down as you unload. It really saves your back, not having to bend over for each piece.
Experiment a little to find the right dump angle, don't go too steep the first time, or you may wind up wearing the whole load.
This also works for some other things, like shoveling a little stone or mulch at a time.
I first saw this done with a load of bagged lime, saved having a man on the truck to pass the bags off.