RE: Cameras
Go Pro makes the best stuff, but to do what you want really takes 2 guys. One to fly the plane and one to fly the camera(so to speak). This is why a lot of guys mount the Go Pro to a quadcopter. The quad can be setup to fly like a plane and you can turn the copter to any direction instead of just the camera. If you go this route, make sure you get a top notch memory card for the camera. Most are not fast enough for video even if they have a capacity.
David