Once you arrive at the Orlando airport and check in at Magical Express, the BCV knows you are on the way to the front desk. They will search for the next ready room for you, so there may be a room ready when you arrive. If there is no room available at the time, yes, you can check your carry on luggage with bell services and have it delivered to you when you return to the room. You must be in your room to receive any items you personally checked with bell services, unlike your DME luggage which will be delivered automatically.