I've been to several other gun shows in Ohio from the very same promoter. (Medina, Summit) Nothing complicated. They will check it at the door, and put a zip tie in it. Carry it around inside, and if someone is interested they will ask "are you selling that?" You often see guys with a flag stuck in the end of the barrel "for sale" "trade for XBox" or whatever. Trying to carry multiple guns will make you tired quick. A sign around your neck or on your back works in those cases as well as buying table space. According to gun show policy, check the buyer's state ID for residency and age. Make exchange, and you're done. If you are a dealer you are required to perform a NICS on the buyer. If you are a private seller, it is not required.
Keep in mind that dealers are in business to make money, and are not going to offer you what they intend to sell it for, so don't be offended. Private buyers are a lot more likley to pay closer to market value.