The advice concerning the shocks is true. It is good and almost necessary to have the shocks but the way they are mounted renders them almost useless. This information concerns any suspension system, coil springs, leaf springs or torsion bars. When a suspension system hits a bump the energy has to be either dampened or the oscillations continue until the motion has ceased. Those oscillations will transfer to your TV, the trailer tires, the interior of your trailer. Shocks will dampen those oscillations and reduce the negative effect that will accelerate tire wear, cause unnecessary internal movement in your trailer as well as adverse effect on your TV. I've discussed this topic on several other posts.
TeJay