Smile, you'll be fine.
As long as you have your name, resort and arrival date you will be fine.
We've shipped boxes to our resorts MULTIPLE times. All boxes arrived safe and sound.
Sometimes takes Bell Services a bit of time to find them but they always end up in the room.
Let the CM know that you have a box that was sent to the resort when you check in. Most of the time they arleady tell you this before you can mention it.
Have a great trip!!