No, I am recommending that he not carry when he is most likely to encounter a non sympathetic LEO.
Try to remember That IANAL and am giving my OPINION, not legal advice.
LeVieux
I am confused, what exactly is a "non sympathetic LEO?!?"
Texas peace officers know the law and enforce it, so there is absolutely no reason whatsoever that he cannot or should not legally carry in his vehicle until such time he gets his LTC and can do so on his person!