They won't tell you the room number even if they pre-assign it ahead of time. You won't know which room you got until you check in and even then, the room has to be clean and ready for occupancy.
Until you get your resort ID/room key, the front desk CMs can change the assignment anyway. Sometimes they do change your pre-assigned room if someone else complains and "your" room meets the need/desire and you haven't arrived yet).
Best wishes -