Can someone explain in more detail the boarding procedures for Jet Star 2? For instance, if nobody in my family decides to ride with me (or backs out when we get there), can I work my way to the front of the line and just wait to hopefully pair up with somebody in the boarding area at the last minute once there is another single rider, or are the staff very strict and attentive about not allowing people to enter the line unless they have a riding partner? Also, hypothetically, if my younger son and two of his friends decide to ride as a pair of 3, do they need to declare that at the entrance of the line or can they enter the loading area and decide at the last second? If they ride in a pair of 3, can they sit in the front of the train, or are the 3 seaters required to be in the middle or back section of the car?