I have an F150 and use 2 methods for transport of my trainer and big stick. Method one: Plane is fully assembled and I have 2 straps that I stapled together to form a loop that fits over the wing with about 3 inches of slack. I loop each of these over the wingtips and then run a shower curtain rod through the loops. The
shower rod is now parallel and over the wing but through the loops at this point. The rod goes between the side walls of the bed of the pickup and then I put some plastic clamps over the rod to pinch the loops. The plane can't move and I go 75 mph on the interstate, 2 exits to my club. Never lost a plane yet.

Method two: Both my planes have nose wheel steering, so I took a piece of plywood and cut it so that it will fit between the sidewalls of my F150. That's the length
dimension, the width is about 4 feet. I placed the plane on the plywood ( in the middle ) and marked where all of the wheels were. Then I cut some 1 inch X 1.5 inch
pieces of wood to form little rectangles that the wheels can fit into and screwed them into the plywood. Now place the plane such that the wheels are in the rectangles, now it won't roll forward or backward. I then screwed a couple of small eyelets into the plywood a few inches on either side of the plane and got some of those small bunji cords and attached one to the eyelet, over the fuse and to the other eyelet. Do this for front fuse and mid fuse and now the plane will not lift off either. I even took it a step further and framed out of the same wood ( 1inch X 1.5 inch) a place on the plywood to accommodate my flightbox as well. Since this is kinda heavy, it acts to hold down the plywood as well.