Now my wife and I are good with the little bit of bounce in the trailer when we walk around, but let me tell you, my son is a Big Guy and when he walks in my house I feel it move.
So I bought a pair of these Eaz-Lift 48860 Telescopic Jacks off Amazon.
And they are adjustable from 16" to 30"
They work sort of like a regular jack stand in that you use the pin to get it close in height then spin the top and crank it up tight.
I tested them in the driveway last night putting them midway between the stabilizers (right in front of the wheels) to reduce the overall bounce from the suspension.
WOW what a difference it made.