These things have locks? 
JK, my main key really never leaves the vehicle, if it isn't in the ignition, it's in the center console cubby. I also have a key ring in my pocket at all times with one on it. If I'm out on a trip with a co-rider and for some reason it gets locked, I always make sure that both potential operators have a key before it get's locked. I also have the inflatable bladder and unlock rods (even glow in the dark!) and a full lock out kit but obviously I don't carry it.

JK, my main key really never leaves the vehicle, if it isn't in the ignition, it's in the center console cubby. I also have a key ring in my pocket at all times with one on it. If I'm out on a trip with a co-rider and for some reason it gets locked, I always make sure that both potential operators have a key before it get's locked. I also have the inflatable bladder and unlock rods (even glow in the dark!) and a full lock out kit but obviously I don't carry it.