Get a luggage trolley, tie reins to the two largest kids and attach to handle/push bar of trolley, place the other children on the trolley itself, tying down if necessary) then wave goodbye to wife at entrance to the terminal.

You don't say how old the children are, but if they are old enough to understand "Behave", "Keep hold of Mummy's hand", "Don't do that", "Stop that racket NOW!" and "What DID you do to the poor Lounge Dragon?" and similar then surely there shouldn't be a problem?!

Can't you get one of these? http://www.shopping.com/xPO-Shamrock...enger-Stroller

I'm sure BingBongBoy can find somewhere convenient to store it in one of his cupboards..