You need to be more specific. When you say CB, a lot of folks will associate it the Westfair or the once Old Target store show.
I'm assuming you are referring to the Mid America Center. According to Suigh (sp) guns it was suppose to be a "reserved" show. Don't know what that exactly means. Heard ads on the radio so it can't be that "reserved". Haven't heard who the promoter is either. Hope it's not Pinoneer or Marv Kraus.
A couple of years ago, they had gun show on the 2nd level of the MAC along with the sports and travel show.
Edit: after a quick google that anyone could have done in less than a minute, it's a Pinoneer show. Cover is $10.
https://www.pioneergunshows.com/