As for the sword, if you have it covered than it shouldn't be a problem, so making a long thin bag about 6 inches longer than your sword with ties on the end that you fold over and tie around the sword, would provide a secure covering that should be adequate for the transit people. Also once you get your sword peace bonded at the con they will secure the blade shut so it can't be drawn (don't worry you can remove this after the con) which should be fine with the transit people as well.