Yeah the best version I've ever seen was Kevin Cookes over in Maryland. He beachwheels the thing up next to the trailer, and the "arms" come down and pick the boat up by its crossbars, and an electric winch powers the thing to its trailered position.

Also his trailer frame was made from steel I beams not your typical flimsy box steel. Undoubtedly makes it harder to blow all over the road.