There's so many ways to tie down vehicles, its all about what works best for you, and what your most comfortable with. Some like to strap the vehicle to the trailer by the body/ frame so the suspension can not travel, and some like to strap down by the tires/ wheels, or axles so that the suspension can travel. Usually whenever I move these trucks I'm comfortable with a chain around the front and rear axle with a binder on each. If I'm going a long distance or feel its necessary, sometimes I'll make sure each corner has a chain and binder. Same goes for straps, when I'm using ratchet straps I like to put one on each corner because they do stretch a bit. Another option that a lot of people don't like, but can be used as well are the wheel straps. Most auto transporters use wheel straps, and I've used them a handful of times. I don't prefer these straps on anything but cars and smaller vehicles mostly because on bigger vehicles like our trucks there are much better alternatives such as strapping the axles/ frame to the trailer.
Here's a couple pictures.
This truck I put a chain and binder on each tow hook up front, and one around the hitch receiver in the rear.
This truck is hard to see, but this one had a chain and binder around the front and rear axles.
And here's the best picture I have of strapping the tires. Another method I like to use mostly with smaller vehicles. Straps around the rear wheels, and usually the front wheels but the control arms were easier with this one.