Typically if your ship is in port from lets say 8am-5pm it docks about 7:30 and passengers start getting off at 8am. If you are staying in the Haven you can be one of the first off. If not your just going to have to get in line. I don't see any problem getting off by 8:30 if you indeed get in line at a decent time. However you never know, port workers, customs to clear the ship can be slow