The snapping turtles are very strong animals.
Even looking at a baby snapper, it isn't hard to notice their thick limbs, equipped with well developed muscles.

In the tank, they might stay calm for a long period of time, but once
they move, they move like a buldozer - pushing and rearranging
the surroundings just to get to the chosen spot and make it fit to their
needs the best way.

There isn't much trouble with having stones and driftwood in a tank with
very young snapping turtles.
They will hide between the branches and climb up now and then to bask.

But once they become bigger, like lets say around 5 - 6 inches
( 12 - 15 cm ), there will be no decoration in the tank that the snapper
would not move.
The enclosure, though, should reseamble their natural environment as much as possible.

Snappers need hiding places in order to feel comfortable.

There are few things that might be done to solve this problem.
One thing would be buying or making a large enough tank and
equiping it with
large enough pieces of decoration that the snappers would not
move it.
But this would require a tank of a size, hmm... a small pool !

In this case, the driftwood could be mounted to the tank,
with a rope, bolt, silicone or combination of all of them.
There still should be some pieces, larger and smaller, floating freely on the surface - snappers really do love hiding !

Another addition would be some rounded stones of diferent sizes , and
a larger submerged rock or two in the middle of the tank ( if large )
and the corner.

I would not recommend any water plants - they will get destroyed by the
turtle fairly quickly.