If I understand correctly the reason there are no or few State Parks listed is because visitors do not choose to leave input. I believe that is where the problem is and I don't know how you would alleviate it.

Got another recommendation. Travelers World in San Antonio Texas. http://travelersworldrvresort.com/
The park has one great feature - retired, active or reserve military are half price on a three day stay. (That means $20 a day!!! The WIFI is FREE, the people very helpful and the park is immaculate. Bus stops right in front for trip to the Riverwalk, ALAMO and several Missions. Huge food market about 4 miles away on the Corpus Christi Freeway. They sell propane and have mobile repair if needed. (from a local shop, but we have a Barth so it never needs emergency repairs-right?)