This is from an October 2007 Dallas Observer article. The bottom line is that you can carry or travel with a firearm any time you wish. This predates the SCOTUS ruling on the Second Amendment right to keep and bear arms. Thank goodness Texas is sane on the right of a citizen to keep, carry and, if necessary, use a firearm. Also, a long gun, rifle to most of us, has virtually no restriction in its possession or carry.
The new law, the first bill Governor Rick Perry signed from the last session of the Legislature, now allows gun owners without a permit to carry a concealed gun both "to and from" their premises and their vehicles. Guns can be carried in cars with a few restrictions: They must be hidden from plain view, and the owner cannot be involved in criminal activity or a criminal street gang or otherwise prohibited by law from carrying a weapon.
In other words, if you're caught carrying a concealed pistol on the street and don't have a permit, tell the cop you're walking between your car and your home, either getting ready to travel somewhere or coming home. The burden now falls on the police officer to prove you are not really "traveling," which Dallas District Attorney Craig Watkins says is virtually impossible.