Texas is still a free Country,
Enjoy the rest areas, most with free wi-fi.
Travel the sideroads, and enjoy Texas roadside parks and picnic areas for 24 hours. Many roadside parks are nicer than many campgrounds. i.e., Santa Ana roadside park, just one of many.
Oh yea, no hookups.
Traveling across TN over the last several years, we have always used some nice TN rest areas for the night without any problems.
Actually, we have not had a problem using any rest area in any state while traveling over the last century, well almost! 2/3 century.
Traveling since 76', always use rest areas, roadside parks when going from A to B.