I'm an old guy and have pulled trailers (not RVs) for 50 years as needed and still can't back worth ****. My camper was a series of small slide in truck camper for many years and as of last year a B so when I pull it is a 12' box trailer behind the camper rig. Since I know my limitations I have had a front hitch for tight spots on my last two trucks and I just push the trailer where I want.
I normally don't watch the backers having trouble but I do on occasion watch the good ones. My most memorable was maybe 15 years ago, I was all setup and a huge 5th wheel pulled up in front of me to back into what I thought was a very tight spot. The wife got out with a headset on and a stick and started walking around talking to her husband. They backed into that very tight space first try no maneuvering one try and stopped and with the help of the stick when they pushed out their slides they came with in a few inches of the trees. I went over and told them how impressed I was.
My wife knows not to try and help me, even for lining up the hitch, it never helps. It takes fewer tries without her hand signal instructions. I added a backup camera to the B that I can actually see the hitch.