Hello, Larksana!
What a great idea!
Shipping specific items you'll need during your stay at a Walt Disney World resort is very smart, especially with all of the goodies your 10-month will need. We ship items to ourselves every time we visit WDW; it's easy and there is no fee from Disney for doing so, either (just your shipping costs.)
Be sure to allow for enough time for your box/boxes to arrive at Disney's Coronado Springs Resort, as we have often had delays (on the part of the shipping company, never Disney) and I'd hate for you to arrive and not have your necessary baby supplies. You can ship boxes to your own attention at any WDW resort's mailing address, specifying that you are a Guest and the dates of your stay.
Disney's Coronado Springs Resort's address is 1000 West Buena Vista Drive, Lake Buena Vista, FL 32830. Again, address your packages with the resort name and address, then ATTN: with your name, identified as Guest, as well as your dates of stay on the label.
At check-in inform the Cast Member that you should have a delivery which was shipped in your name; that Cast Member will assist you with your packages at that time. Easy, right?
Have a wonderful trip with your little one! Send more questions as you think of them; we love to help!