OK,, I talked awhile with the Lady running the Lincoln gun show,,
The reason you cant carry at ANY gun show is Insurance.. There is only 1 company that supplies insurance for these events,, Its thru the N.R.A. and the policy is covered by Loyds of London,, they are the only one in the United states that sells insurance for gun show,
NOW.. some show ignore the rules and let people carry,, but if they have a accident,, the insurance is void,,
some show operate without any insurance.. again,, if something happens, someone is going to get screwed..
I hope this explains why you cant carry at gun shows,, its not the people running the show!