Well, we are back from our trip and can report that the shocks made a noticeable improvement!
We took all back roads on Friday to avoid rush hour traffic. We went over some railroad tracks and some bumpy roads. Only one drawer slightly open on arrival.
We took the highway home on Sunday and nothing was disturbed on arrival.
Most of the bouncing in the rearview was gone. At the campsite, it was neat watching the trailer tires go over the speed bumps at not seeing the body of the trailer jiggle. The tires just rode up and down them solid.
They seem to be a worthwhile upgrade. I will keep reporting as this was only a 120 mile roundtrip.