Hi Matt,
You can simply add a Null and parent your camera + interest to that, then move the null. Another way I like is to make a camera “rig”. Try this :-
1)Create a null, position it at 0,0,0. Name it MASTER.
2)Duplicate + position new null at 0,0,-1000. Name it ZOOM
3)Position camera at 0,0,-1000 + interest at 0,0,0.
4)Parent ZOOM to MASTER and camera to ZOOM.
Now you can easily rotate / position MASTER and use the Z position of ZOOM to zoom in/out. Hope this helps.
Cheers,
Andy