+I know this won't help you but, once we went to a site at e Casino in Pahrump. We checked in and were told what our site number was. Had a 36' fiver. Got to the site and across the way, there were about 4 or 5 guys sitting in lawn chairs just BSsing. I started to back into the site and lo and behold, their ears perked up and were going to watch "the show".
It was a tough site to get into. Lana said, "Do you want me to spot you?" I said, "No, just keep reading your magazine, I HAVE to do this".
I probably took about 5K miles off the front tires "wiggling" it into the spot but, I did it in one shot!
Even to the point of getting the space between the slides to match the power pole. It was a good day. I was impressed.
Later, at the restaurant, we met one of the guys across from us. "Where, ya staying?" I said, "Right across from you". He said, "You got the grey Dodge?" "Yes, I do." He said, "Dang, you can back! No one EVER gets in these spots in one shot!"
It was a good day, indeed.
With practice, you WILL get good, also!
Practice, practice. practice.
Oh, yeah, tell the wife, not to worry about traction. That's not really under your control. Her job is to stay where YOU can see her, and watch what's above. You worry about where the wheels go. The rest will take care of itself.
Another time, we were backing into a spot and I couldn't see her. I waited and waited.
She struck up a conversation with the guy next to us. She knows, if I can't see her, I don't move. Truck was straight piped. Things get loud when it's impatient. After a couple of raps on the smoke pedal, she got the hint and got to where she could see me and I could see her. Parking proceeded. DO NOT MOVE IF YOU CANNOT SEE HER!