I use to use Chock & Lock, which I found convenient, but a couple chunks of 4x4 blocks was all I ever needed to keep the rig in one place.
The Chock & Lock worked well on my King of the Road with the Moryde suspension because it stopped a "quivering" when parked that was due to the suspension flexing and turning the wheels slightly. Locking them stopped that, whereas the wood chocks did not.