I do not depend chocks or boards of any kind.
All of those methods can fail.
I had my TT roll many years ago. It was setup with chocks on what appeared to be solid dirt... It rained and that dirt turned into soft mud. The chocks sunk into the mud from the pressure of the tires. The boards under the TJ tilted in the mud and the TT rolled forward collapsing it. Fixing this in a muddy downpour was not fun.
I have seen others have the same thing happen to them in just soft dirt. I have never depended on chocks since that day many years ago.
I now use the strongest and most foolproof system there is.
Gravity.
I dig holes for the high side tires. Once the TT is set into the holes, Gravity makes sure it stays there.
I do use some homemade wood/long bolts to clamp the tires to make it more stable, on occasion. But that is only for comfort, if I'm going to be there awhile.
I have gotten really good at estimating how deep to dig the holes.
And the only thing I need to have is a shovel. It is a handy thing to have in camp anyway.
Obviously, this solution is not for everyone. I do not use established campgrounds with neighbors I can see or hear.
I prefer the solitude of boondocking on public land.
But where this can be used, it works very well. Gravity has never failed me.