I never considered them extraordinary skills, just what I had to know. Backing a trailer or backing a hay wagon was just a way of life. And if you've ever had to back a loaded hay rack into a barn just as a rainstorm is starting, you'll know that it can be done FAST. If you think it's tough with a tractor, try it with a pick up truck.....that's ALSO loaded with hay. Not nearly as manueverable as a tractor. (Learn to use the mirrors)
I took my shot at our 4H tractor rodeo way back then. I did ok. Not great, but just ok. My best friend smoked everyone. He had a great teacher. His dad. I saw the man back two loaded wagons, hitched back to back, in a barn, both OVER loaded with straw. He never stopped moving. One shot and in the door. (Trick is to KNOW HOW and KNOW WHEN to start turning. You don't make corrections, 'cause you don't make mistakes.)
My first house had a driveway that opened out onto a BUSY state hi way. There wasn't enough room in the drive to turn a trailer around. The only way in was to stop traffic and back in as fast as I could. I got better quick.
Trailer and wagon backing is like a lot of sports. The better you get, the more you can relax and enjoy. The more you relax and enjoy, the better you can get.