would be fun to back up, tho i know a guy who would probably do it quite happily....
watched him back onto the dolly of his dog trailer one night, straight into the ringfeder
not special till you consider it was on a bush road, around a corner and the only clue he had as to what was where was me shining a torch on the lead tyres of the dolly
That's all you need, to see and line up with what you hooking up to.