Egyptian secret.
Big ass Case loader. Damn bucket was 6" wider than the trailer though, so I had to stand them on the edge and push them over into the trailer. Then we used the smaller Tractor to shove them forward. Luckily it's a dump trailer, so once I got them spun the way I wanted ( with ratchet straps and a digging bar) I tilted her up and slid them out one at a time. I chained the back one in while the first one got dropped out.