I don’t know if other people have tried this, but when we’re backing up our 5th wheel, my wife stands way back where we want the trailer to end up, FaceTime calls me and then aims her phone so I can actually watch the tail end of the trailer as it rolls into place. If you have a bumper pull, it’ll probably be an easier way to see the hitch when you’re on the target. It’s all out the window if the phone reception is bad, but it’s worked out pretty well so far.