[rwhunt99]

For your scenario, you might start out with a wide angle lens for a panoramic shot and and then as you descend you can and gradually go to a telephoto shot of your destination and rack in as you get closer. You can do this in the camera properties panel with the "E" button (stands for envelope), this will open up the Graph editor that will allow you to adjust your focal length along the timeline

You can also use a null to control anything from path of the camera to how and where to focus.

I think as of this time, layout will still only allow you to render from one camera at a time, you can then edit your scenes and put a scene together with a video editor.

I didn't ask what version you use, but anything after v8 will use a variety of cameras, have fun exploring the different effects you can get from the many different cameras inside Light Wave!