We're here too. Stayed at a airport hotel overnight. We bought a ticket for the airport bus at the ticket info desk at the bus stand at 10am today, 10 euros as you say, good value too. Nicely settled into to a nice hotel less than 5 minutes from the ticket pick up point & bus to stadium.Here already. Irritatingly a number of African kids with Chelsea shirts around the Old Port. Good bit of advice, airport shuttle bus very efficient. Turn left leaving the airport to bus station, ticket machine card only. 10 Euro into town direct to rail station.