Comfy shoes. I think one of the best things I took with me was a backpack. I could put my purchases, snacks, bottled water inside and still have my hands free. I don't do well with totes, I end up achy. I also had a small passport-thingy that hung around my neck, it had my admission tickets, id, credit cards and cash inside.
The post office sets up a booth right there at the show, so you can ship your goodies directly to your house. They're not there on Sunday, so if you need to ship, do it before then!