This is very, very good. My first thought is: can you add a Layer for the camera position so you can add a group to better organize the stored cam positions? I can make a uniqe name for each group my self off cource, but making a scene I want to use many locations and can imagine it would be easier to find a something based on a group and then a name?
Also: I would love a button to delete a cam position, and one to update a current position with a copy function perhaps?