Just a couple of thoughts:
For anyone traveling within the State of Texas with a gun carried in your mode of transportation, it is has long been mutually understood that you are not required to have a concealed gun permit if you are traveling across County lines "in transit." If stopped while in your car and the gun is in the vehicle (for example while going out to eat away from the RV resort) and you have stated to an officer you are "in transit", you had best have extra clothing, bags, etc to show proof.

In addition, if stopped for a potential violation of some sort in Texas and you have a concealed weapons permit from Texas or elsewhere, it is recommended that you provide the officer with your driver's license and gun permit simultaneously. If they should search your vehicle and find a weapon without the officers having been forewarned, get ready to make bail.

For the record, one of every three trucks in Texas has a gun on board... that is a bonifide fact published by numerous sources. I never give any trouble to these guys who look suspicious because I am reminded of the bumper sticker stating "Keep honking, I'm re-loading".

Reagan