TexasCHLforum.com

I would suspect they have security at the gate with a wand and would give you verbal warning that your handgun would not be allowed. They might also have a 30.06 sign and I believe Red Stone is a private club. I guess a porta-can might be a "building or portion of a building".

OK, how 'bout that pesky word "premises"?

on the premises where a high school, collegiate, or professional
sporting event or interscholastic event is taking place, unless
the license holder is a participant in the event and a handgun is used
in the event;