You MAY be able to Bypass The Front Desk. If you are able to Bypass The Front Desk, you will get a text before arriving at CBR with your room number. If that happens, you can go directly to your room and your Magic Bands will open the door. This doesn't happen for everyone, but does happen.
You may also get a text stating your room is not ready yet, but has been assigned. Then you will get another text with your room number when it is ready. If this happens you will also be able to go directly to your room with stopping at the Front Desk.
Or you may not get any text and if so, just stop by the Online Check In desk to check in. If your room is ready, they will give you the room number. If it's not ready yet, they will text you the number when it is ready.