think that there is know of any conclusive case law on this. I am not a lawyer but I'd say do so at your own risk.
The vice president of CATI Texas was recently arrested for precisely this thing. Granted, he was arrested by a Temple, Texas police officer, which should be viewed with extreme scrutiny given their history, but...
Here is the UCW (Unlawful Carrying Weapons) for Texas http://www.statutes.legis.state.tx.u...E.46.htm#46.02
It states: (a) A person commits an offense if the person intentionally, knowingly, or recklessly carries on or about his or her person a handgun, illegal knife, or club if the person is not:
(1) on the person's own premises or premises under the person's control; or
To me it would make sense that it would be lawful to carry on any private property on which you have permission to be, and to be armed. Again, I'm not a lawyer, though.
Following the news of the above arrest, I did some Googling on the issue and for the most part all I could find was a bunch of 50%s giving their uneducated opinions on the matter. I found maybe 2 cites in discussions comprised of probably hundreds of posts. Nearly useless.