Honestly I don't use the vertical view camera. And normally in real life (except some long line work where you use vertical references) you would have a load officer giving you directions.
If you observe how PAPI lights work, it seems to me that they change based at where you are (vertical position relative to PAPI, maybe some function of height/distance).
Knowing that I can conceive that based on your position (x,y,z) referenced to an object, lets say a infantry man with the proper animations, the animations would be different for that x, y and z relative position. So for example, if you were a few meters above cargo, the object i.e. the infantry model, would give you arms down, when you were at the right position (again, x,y,z) the model would be static. Obviously that this infantry model (simulating the load officer) should be also placed according with the cargo load model.
Hard to follow but I think you guys understand what I'm saying.
Cheers.