For less money and weight, how about developing some hitching aids? Back when I had a stock trailer I set up two potato chip bag clips with dowel rods sticking out of them (one on the trailer, one on the truck) such that I would be lined up left to right while backing. I could then get pretty close to the back up alignment by watching to distance between the sticks. After hitching up goosenecks or fifth wheels for 25 years, I still, usually, have to take a couple of swipes at it before things are well enough aligned--that back axle just doesn't want to jump side to side very quickly. There also are cameras and other hitching aids available commercially.
