I always add the ViewPlatform to a TransformGroup. Which in tern a View object is attached to the ViewPlatform. I modify that first TransformGroup to move the camera around. That seems to be the only thing you can do.
There is a method in ViewPlatform that returns a TransformGroup; however, it says it gets the bottom-most TransformGroup associated with this ViewPlatform. If you keep a refernce to the TransformGroup that u added the ViewPlatform to, then it should be the same as what is returned in that method (
I think thats all there is too it ... feel free to add if I am missing something.