My comments were intended to demonstrate why I think about these things all of the time, because I have experienced similar events. I have had a couple of very close calls in commercial aircraft as well.

The fanny pack on the front does not impede your egress in any way, and I have tried it in a simulated emergency evacuation of a commercial airliner.

You are correct that you will most likely be near an airport or city if you go down and survive, and that THE MOST IMPORTANT THING is to get out. Any grabbing of things or placing on the body must take place before it goes down.