I was at a mid size show two weeks ago in Raleigh NC. A lot of the dealers there were headed to Chicago for the National as soon as it was over. In talking to them I didn't find one dealer there who is a fixture at selling at the National that plans on going to Atlantic City next year. One dealer said it will be the first one he will miss since he started setting up and selling 22 years ago. The reasons? No good flights (as mentioned), terrible family city, poor security during last one, tables way too expensive when the promoters got a "steal on the venue", expensive accommodations, etc.
I've never been to a National but would love to cast my vote to bring it down south for all us neglected collectors.
Drew