Gizmo surface fly-through/walk-through ?

Hello-

I have a topographical surface generated in 3D by Gizmo. I'd like to make a movie in which the camera (or viewer) performs a fly-through over the surface along a defined path. For example, directing the camera to fly through a valley then over a cliff. So two questions:

1. Has anyone written a code snippet for something like this? For example, a procedure where you can define a 3D path wave which the camera will follow.

2. Is there any advice on what Gizmo commands might be useful for controlling the 'camera' with a 3D path wave?

Thanks!