camera path

In other words you want to translate and rotate a user (like a rail shooter) but still allow them to look around using the Rift's orientation sensors? Are you using the position sensor as well?

If so, I think if you make an OVRCameraController prefab a child of your moving GameObject and set the FollowOrientation param to said parent GameObject I think it should work.

I've used this, you create a spline and assign the OVRcamera
Camera Path Animator
https://www.assetstore.unity3d.com/en/#!/content/617

Both excellent answers. Thanks, I'm going to try these out

If those aren't working for you well I'd recommend the below:
https://www.assetstore.unity3d.com/en/#!/content/2506

It is very easy to use and has the added benefit of applying to any type of pathing, such as characters.