All kidding aside, I have flown a few flights in a 150 and a 152 that had a camera mounted. There was a mini tri-pod right behind the seats that let the camera sit and shoot between our shoulders, almost at roof height. It was perfect. It allowed the camera to have all of the panel in view as well as outside.
I have a picture of the set up on my computer. (I think) If I find it I will post it.