Hi Dennis. If you hope to trade with people on these boards, you'll need to leave the roots intact on each rhizome (ok to trim, but not cut off), cut the leaves in a fan shape -- about 6" long or so -- and then dip the rhizomes in a 10%bleach/90% water wash for a half hour or so, remove from solution and rinse each rhizome, then allow rhizome to dry so that it doesn't mold during shipment.
As Linnea said, you'll need to know the name of the Iris or show a picture so that people know what they're trading/getting.
BTW --
to our list -- and hope you have fun at the fair!! Oh -- and whatever you do -- do NOT duplicate what Lowes/Agway/Walmart/Home Depot/etc. does to Irises. Knowledgeable Iris people avoid those like the plague!!!
