I didn't notice he was heading up hill and unloading so straps was not an issue. Many years ago when I worked for the State we hauled a back hoe and a Dozer (not at the same time) on a flat bed single axle truck. Heavily overloaded I am sure. With the back hoe I would drop the air clear down in the tires, load it, chain it down good, then air the tires back up. No bouncing to that load. Brakes on that ruck was strictly vacuum booster over hydraulic. If you needed to stop you better start braking a mile ahead of time. Wonder we all lived through it.