I was carry concealed like I do every day, and was prepared to forego entering if they were posted 30.06. (I didn't need to go in there badly enough to give up my right to carry). I looked closely at every entry point, and observed no 30.06/30.07 signs.

They did have large generic signs with red lettering, stating that no loaded firearms were allowed inside (not valid to LTC holders), further stating that paying the admission fee would grant me a "revocable license" to enter into the gun show area. My guess is if I were discovered to be carrying, they could/would eject me from the event with no refund. All firearms were required to be shown to a law enforcement officer at a separate table for inspection and securing with plastic cable ties. Again, not valid to LTC.
I paid my $7 entry fee and enjoyed an hour or so browsing, comfortable with my concealed IWB handgun on my person. Again, I didn't see anything that I considered a good deal, so I left with all my money except the $7 entry fee. I did visit with a gentleman who made some really nice handcrafted leather holsters (I'm looking for a nice "BBQ holster" for my 1911). He was open carrying a commander-sized 1911, and it had no magazine, and had the plastic cable ties the LEO put on it.

Oh, yeah - they did have a separate ammunition "corral" area, where you could purchase bulk ammo, but you had to leave the building by a separate entrance, and could not go back into the area where the guns and knives were if you had ammo with you.
All in all, a pleasant experience, and I was happy not to have to worry about improper 30.06/07 signage on city-owned property.