Get going down a back country road at about 65 and pull the slip knot loose and let it fly! If need be, I just get the trailer fishtailing to get the rest off.
Seriously?
It only takes a couple of times fighting a trailer load or two of brush before the beauty of a simple small chipper and dump truck combo catches your eye. Dump trailer or not, you're wasting everyone's time, energy, and money otherwise. It is sort of like leaving the chainsaws at home so you can use the hatchet, axe, and the two man for a takedown. And I've seen that done too. LOL! It will get the job done, no question, and although very educational, it's not effective enough to be competitive in the long run.
I've had so many people want to bypass the chipper thinking it will be less money for less equipment. The price only goes up if I have to handle it any other way. When the customer opts to handle it, it isn't long before even they want the chipper. And once they see the difference, they understand.
I've done the trailer thing in a pinch, but always brought it back to the farm and pushed it all off into the burn pile with a tractor. I've also tried the chainsaw chipper technique in a grain truck, too. Still a waste.
I now push the button on the dump box.
