I adjust the height of the camper with the landing gear to the height that it was when unhooked. Lower tailgate. Place one magnetic hitch alignment orange ball over the center of the jaws on the hitch plate and the other over the king pin on the trailer pin box. I have a 5 inch by 8 inch adjustable mirror attached to a clamp that I attached to my passenger side sun visor. Back up the truck using the magnetic hitch alignment balls. With the mirror adjusted, I can clearly see the hitch plate and the king pin. Make sure the height is correct, get out and look if necessary. Continue backing until pin locks. Visually check jaws. Raise landing gear 1 inch, do pull test. Close tail gate. Enjoy the trip.
Wade