Another possible solutions is, you could do one scene up to the point where you want to change the camera direction, then do another scene picking up where the other one left off.
I do this now and then just by making a duplicate copy of the scene in question, running the first copy of the scene up to the point I want the change to take place, then opening the second copied file and deleting all the animation used in the first scene with the camera in the start position of the new scene.
"The Sage as an Astronomer: If you still see the stars as something above you, you lack the eye of knowledge." Friedrich Nietzsche