For me, most important things to remember (basically repeating what others have said above):
1) Food - pack a full day's worth
2) Backpack - to carry food, purchases, items to sell/grade, checklists, etc
3) Checklist/Wantlist/Pricelist
4) pencil & pad to write stuff down like contacts or offers or table #s to come back to etc
5) comfy footwear
6) deodorant - wow were there some stinky people by 4pm!
7) net54 pin from 2010 Baltimore National!!!!
Have fun Barry!
Rob
