You should also have a signal mirror and some flares. All these things should be in a handy pack. Together, these constitute a minimum survival kit. You can always add more, payload and pocket permitting. You could draw straws.
Short straw sits in back.
One way to find out who your friends are. The guy in back hasn't got a great history of getting out of that one door. And, assign survival equipment to specific occupants. Your job, in case we ditch, is to get out with the life raft. We'll meet at the tail, if the airplane is still afloat.