From time to time I want to move trees anywhere from 5-500 miles to either a new nursery location or permanent planting location. Usually these trees are potted, sometimes they're bare root, rarely are they ball & burlap.
How should one move trees using a pickup truck? When possible, I just put potted trees in the cab. Trees larger than a few feet need to go in the bed however. With bushes I've transported them standing up but this seems very risky with wind damage. The best way I found so far was to actually lay the trees gently on their side, root-end against the cab and crown toward the tailgate (or even hanging over the tailgate with a ribbon tied to their top if they're longer than the bed). I then tied the root/pot against the cab/down against the bed to keep the tree from sliding away from the cab, potentially damaging its crown. Then I covered it using a tonneau cover (which only worked because I only had a couple of potted trees at that time - if I had to stack many pots of trees that way I'd probably need an agricultural fabric or a truck bed canopy).
How do experts (e.g. nursery workers) move many/long trees in pickup trucks? If using a trailer, what kind and how?