Yes, the 3-judge panel nonetheless upheld the challenged ordinance.
I think the ordinance was valid.
No matter how broadly you want to interpret the 2A, you do not have an inherent right to sell firearms on county property, just like you don’t have a right to set up a hot dog stand on the White House lawn.
OTOH, incorporation is a big, big, deal.
I personally think that the court overreached by saying the fairground is a sensitive area, and if the Nordykes can go back and find that the county allows other people to sell other things at the fairground, they can duke out the sensitive area part of the ruling. Which they may even win.