How do you hook up your 5th by yourself?

I suggest the next time you are hooked up, you take a small amount of tape, paint, or some other marking substance into the bed with you. Put a line on the lower center of your back window in line with a line on the front of the hitch. Yes, lots of lines. ;) Maybe you'll need someone sitting in the dirver's seat to ensure the window and hitch lines are visible.

All you have to do then is line up the lines while looking in your rearview mirror. That would eliminate 2 trips on and off a ladder.