Bwahahaha! I would just have them page her over the loud speaker. I've done it to my parents AND my children...lol
LOL I wish. She's almost completely deaf and blind. She gets in the electric cart and disappears. She wouldn't be able to hear the loudspeaker. I know, I've tried having them page her and she doesn't hear it.
I never thought of a luggage tracker, probably because I never travel.