I'm completely unqualified to offer an opinion on this since I'm taking my Montana on its first camping trip next month...
But with that said, I'm using
BAL 28012 X-Chock wheel chock/stabilizers. I can say that with these on my RV in storage, I've noticed considerably less movement when I'm working inside the RV.
I'm also planning to get the
SteadyFast RV Stabilizer System that was reviewed by RV YouTube vlogger Jared Gillis on his YouTube channel "All About RVs"
https://youtu.be/7DVfbO9o-eM
Again, I'm inexperienced with this, so just saying what I have and am planning to do.
EDIT: Jared's install and review video of the SteadyFast:
https://youtu.be/nWGWwMCXmgc