I tend to agree with rwhite1223. I had a steering stabilizer on a Chevrolet P32. I didn't notice much that I would attribute to the steering stabilizer either good or bad. In theory all the steering stabilizers use opposing spring tension to center the steering. Adjusting this so the vehicle doesn't pull to one side can be difficult.
There are essentially 2 types. Click on: SteerSafe
There are several brands that work like this: Road Master Reflex Steering Stabilizer
. All these brands have a shock absorber type device that has opposing springs. It connects between the tie rod and the axle.
SteerSafe works directly on the steering knuckle. By doing so it bypasses any movement in the tie rod ends, ball joints/king pins or any other moving parts of the front steering.
All the rest allow movement of the steering components to affect the steering.
If I were going to put one on my RV I would install SteerSafe.