DW and I started our new Adventure yesterday. I have never pulled a 5th Wheel before. It is a learning Experience. We learn from our Mistakes. When we got to Ringold, Ga I misjudged a Turn and I smash...
Before I pulled ours any distance I spent the day in a large parking lot with several orange cones. I practiced turns and backing and using the mirrors.
However unless you pull one every day you're still liable to forget to turn wide enough, so what you did is not too unusual. At least it wasn't too bad.