Salty, the electric stabilizers kind of suck. I've installed the SteadyFast and they helped but did not eliminate the movement from the suspension or the lightweight construction of the camper.
SteadyFast install pics
What does work for the steps is a fairly cheap fix, it is a
Step Stabilizer. Versions are under 20 bucks and works quite well preventing the movement when you go in/out of the camper.
As far as determining when you have enough pressure, I have bubble levels mounted where I can see them when I'm deploying the stabilizers. I usually deploy the rear first and wait until I hear the motor start to bog down, the camper creak a little bit and the bubble just start to move. Then I do the same with the front. Even using pads under the stabs, you'll need to firm them up again (possibly more than once) as the trailer sits as the ground compresses and loosens them up.