If you have a small utility trailer, you hook it up to the tow vehicle by simply getting the hitch ball close to the trailer and then just lift the nose of the trailer up and lower it down atop the ball. The "nose" of my horse trailer, however, weighs 300 pounds, so the ball of the hitch must be driven precisely under the nose of the trailer. That's HARD! But, with a mere $150 investment, I added a back up camera to the bumper that lets me see exactly where the ball and trailer nose are. It's still HARD, but doable.
Because my trailer is so heavy, I had to go with a larger trailer hitch. And because it sticks out so far, I tell people that my trailer hitch has injured more people than guns.