case of international travel? I havent booked a separate flight seat for my 11mos old.. because he is more than 8mos old, i presume tht the airlines may not confirm a bassinet seat until check in time. even otherwise, the best way to put my kid to sleep is on the lap using a boppy or he goes to sleep wen I rock him in the carseat. do the airlines allow carrying the bulky travel system onboard? and also apart from the hand luggage and a handbag which is usually allowed, is it possible to carry a couple of more diaper tots for the baby?