Offer the fair to be a roaming photog.
Have a few people go around the fair and shoot kids on rides and playing games. Have them report back to you every hour to "dump photos on a puter) You add border then print and display for sale to fair goers.

If you want an example, shot me an email to (cndle4 at yahoo dot com)

Another thing I see every year at my state fair (Wisconsin)
Is a coupon sheet for to the various vendors at the fair. The sheet costs $1 and it also affers $1 off addmission to the fair making it "free" to the buyer of the coupon SHEET.
You get the idea. It may be to late this year for this one but, think about it next year.
Make each sheet generate $2 in ads.
Pay back the fair admission to the gate pay your "flyer pimps" 50 cents and you keep 50 cents from each sheet less printing.

If you set this up and only 25,000 people buy your ad sheet, you make $12,500 Less printing.


Hope these are a couple of Ideas that will help you out
Jason