FYI, I went to the gun show at the Richard Borchard Fairgrounds in Robstown today and I noticed it was 30.06 posted. IIRC correctly since the place is government owned (Nueces County) the signage cannot be enforced.
TEX PE. CODE ANN. § 30.06 : Texas Statutes - Section 30.06: TRESPASS BY HOLDER OF LICENSE TO CARRY CONCEALED HANDGUN
TEX PE. CODE ANN. § 30.06 : Texas Statutes - Section 30.06: TRESPASS BY HOLDER OF LICENSE TO CARRY CONCEALED HANDGUN
(e) It is an exception to the application of this section that the property on which the license holder carries a handgun is owned or leased by a governmental entity and is not a premises or other place on which the license holder is prohibited from carrying the handgun under Section 46.03 or 46.035.