another tip is to pull the ball forward in the coupling, whether hooking or unhooking.
this releases the coupler latch and makes it easy for the ball to clear the coupler.
in fact, when hooking up, i put the ball just ahead of the cup, so that when lowering the tongue onto the ball, it has to pull the coupler onto the ball.
and when unhooking, i make sure the tandem chock is on and i pull the truck as forward as possible, without moving the trailer.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC