It was something I learned from these boards. I didn't want to have to check any luggage so I packed some clothes, pair of sneakers, etc., in a 14x14x14 box. It cost $14 one way and will be there this Friday. I'm also bringing a small carry-on to hold my laptop, some clothes and some toiletries. I plan to pack any souvenirs I purchase at WDW, in my carry-on instead of mailing them back home.