At certain times, it's perfectly safe to give over the care of your belongings to the powers that be. At other times, it's not. This is one of those times when keeping very close company with the things that you hold most dear wouldn't be a bad idea: especially if you're traveling and you'll need what you've packed as soon as you arrive. This is one of those moments when carry-on luggage is less of an inconvenience than it seems to be when you're lugging it aboard.