I plan to fly to Illinois from NJ to participate in a sporting clays competition. I want to take my shotgun. This will not be a problem on the plane, however, in NJ I must take the train to the airport. Can I transport the gun broken down and in a locked case on the train? The statutes I read all refer to transporting a firearm in a car or vehicle and require that the weapon not be accessible and in a locked case. Of course on the train the gun will be in my possession at all times. Any experience with this?