All what you-all already said plus:
a book for if I get stuck somewhere
swiss army knife (40 years old belonged to my dead Dad)
coin money for hospital vending machines
rosary (not a RC myself but like the beads/prayers and find it calming and focussing.Haven't "needed " it yet but the thing is in an emergency you have only your rote memory and "automatics" to rely on. It is no time to start scrabbling around in your concussed or shocked brain for something meaningful ,politically correct, and theologically sound )