I don't believe any of the tool vendors give any significant discounts at OSH, but I could be mistaken. I know for a fact, that Van's doesn't and they would prefer you to order directly through the office. Their tent is a zoo during the show.
If you have the cash on hand, I would order now. Why wait for the fun to begin. The tools and the empennage are shipped via ground freight. So depending on where you live, it may take a week or so lead time just for freight.
Just make sure to time things so they don't arrive while you are at OSH.
