Offset Relative to Object, not World

So basically, I have llSetPOS(llGetCameraPOS() + offset), with offset being lets say <1,0,0>. What this does is essencially make the object constantly stay WEST of the camera's position, relative to the world. What I WANT is to have it LEFT of the camera, relative to the camera's position. Make sense?

Can I do this somehow? Set an offset, through some scripting, that will be based on the camera's position and not the world?

I think multiplying it with the camera rot should work.

vector offset = <0,1,0>;  // its either 1 or -1, cant remember, just try.
 
  llSetPos(llGetCameraPos() + offset * llGetCameraRot() );

Not working. I get Syntax errors, type mismatch.