We have always had shops at Downtown Disney send packages to our resort. As long as you aren't checking out the next day, you should be fine. I have never mailed things from the shops to home. However, I have read on these boards that it is cheaper to send from your resort to your home. That way, you can combine purchases if needed. With the costs of baggage on airplanes, this will probably be the way we go in December with all of our packages!