Got the trailer back, but don't know how to back up

I like to get out and look as mentioned. In addition, I found a wireless camera and screen at a decent price. I place the camera on the ground or picnic table at the back of the campsite on the blind side of the camper aligned with the pad. I watch the tire move to the pre-determined location on the screen. My DW's job is to make sure I don't hit anything else (limbs, etc) that I can't see either through the mirror or screen.