Lock VR HMD so camera postion is unchanged?

In VR, the player can move the camera out of the box I’ve created simply by moving their body in real life by a foot or more. Is there a way to lock the HMD’s position in one specific area so that when the person moves the camera doesn’t actually move? Or even create some sort of collision bounds for the HMD?

I would still like to keep rotation enabled. Should I look into clamping?
Below’s the camera setup I have – trying to make it so the camera can’t leave that cockpit space.