My dad always used to keep a spare key for the car taped underneath. He never once locked himself out tho.
I have to wonder if there is a suitable spot underneath your camper for taping on a spare key(s) where crooks would never find it? Same for TV?
Problem for us now is we have too many keys for the trailer. One for each of the two outside doors , one for storage doors, one for locking pin on hitch shank and one for coupler lock. 5 keys total.
Many keys = many problems (old chinese proverb).
I would sure hate to lose the key for the lock on the coupler and not be able to hook up and go home. DW likes to hide important things in special places where nobody would ever think to look. Sure works well.... Never did find our original safety deposit box key (lock had to be drilled out).