For the record, while this may help slightly, it won't stop the wobble. Your money is better spent on something like JT Strongarms. Your camper is moving due to the suspension, as well as slightly rocking back and worth on the wheels.
I use a locking wheel chock that reduces the amount of rolling motion between the tires. I also use 2x4's against the frame, tightened with a ratchet strap. This isn't mine, but its an example of what I am talking about.
https://www.jaycoowners.com/forums/f...ers-37539.html
It works similar to the JT Strongarms, using lateral force to prevent (but not totally eliminate) some of the motion. When we are staying for longer than a weekend trip, I'll use the 2x4 braces. We really notice a difference in the stability with them.