Your best bet is to save the camera settings back to the Poser Library for this particular prop.  There are many scenes on the market with multiple camera angles already included.  You always have the option to create your own or add cameras to the existing scene.  All you need to do is load your scene and select the camera angle under the Cameras tab.  AFAIK, you can't save camera angles as part of a prop.

You can also save or export the scene as a.PZ3 file which will retain camera angles and everything else you add to the stage.