I know that there are nifty bed mount cameras for this, but I was looking for a low tech solution and found one that I am sharing with you.
The challenge is backing the pickup up to hitch the 5th wheel. In our setup, the only way to see out to back window down to the hitch is to prop yourself up at a strange angle in the seat, twisting around while keeping your foot on the fuel peddle, ready to switch to the brake. My neck and back don’t work very well for that kind of Jujutsu move anymore so I looked around for a cheap alternative.
My solution was a wide angle lens that sticks to the back window of the truck. The lens “bends the light” letting me look through the rear-view mirror and see the hitch. To help things out, I put some fluorescent tape on both the edge of the hitch and the front of the hitch.
Once I put the wide angle lens on the window and tried it out, I took scissors and cut it in half, using only the bottom half on the window. That kept the lens low enough that I can look through the rear view mirror when driving without the camper and not see much of the lens at all.
This setup has been surprisingly helpful. I line things up without turning around at all, just looking in the mirror as I back up to the 5th wheel. Admittedly, there’s a bit of a learning curve, but this set up works well, especially when you consider the low cost.
See individual photos with captions.