Well, I have a MY 19 with Push Button Start, only 1 door lock, and the tail gate is all electronic, no key at all. I had a "extra" door key made that I carry whenever I go out, because U can lock the FOB into the truck if U do not pay attention. Truck only stops the incident twice when off, and if U R like me and all other PPL, and just throw keys into center console while driving, U CAN lock yerself outta truck if it is running. Just a FYI.
As far as carrying the second set around, I do not do, but when took a long trip, when my betta half was alive, I always just had her carry the extra set and not leave in truck, just a saying.
ADDED: Definitely have all truck reprogrammed so "lost" FOB has no effect. So easy to walk out in a parking lot and hit panic button, one of the down falls to all the new electronic stuff. Years ago, some places used to make lil "license" plates to put on key rings. More than once I told PPL to take that silly lil ornamental item off of key ring, as it id's yer vehicle if lost.
IF yer house keys were on ring, I would have house rekeyed also. Just my opinion and a heck of a lot of years in law enforcement, and also gives U peace of mind.