My DS will be attending MMI. We received a list of things to pack, among them a foot locker trunk. We will be traveling from the northeast by plane. Is this something that will be able to travel with us? Not sure if this is something that can be checked in as luggage. Any insight on this would be appreciated as well as any specifics on packing. Also, any insight on what to expect at check-in this August. We will be traveling with our DS and wondering to what extent, if any, we need to be available. We want to make sure our travel plans coincide with whatever check-in entails. Thanks for any and all advice!!