Some T-6s, the Navy version, called an SNJ, have seats that can turn around. This is very handy! One thing to keep in mind though, is air-sickness. Some folks don't do so well flying backwards. Also, spending too much time looking at your camera's monitor or through the viewfinder can make some sick as well. If you start to feel funny, put your camera down and look out of the airplane. And don't feel too bad, there is a very famous and successful aviation photographer that gets sick all of the time. It's not a macho thing, it's an inner ear thing. I'm just lucky it doesn't affect me.