I visited the Shortleaf camping area in the Tyler State Park for the weekend to participate in a 50k trail race. Each campsite in this area has a sheltered cabin, picnic table, fire pit and 2 parking spots. Tent camping is also permitted on the site but I used my iKamper Roof Top Tent as my primary place to sleep. The sheltered cabin has screens on the windows to keep the bugs out and electricity. I used this area primarily for storage of the food & gear that I used during the weekend. My campsite was located at the bottom of a hill and had a path to the restrooms and showers. These facilities were very clean and had 2 shower stalls and 3 toilet stalls along with 2 sinks. This location had access to the lake via a short hike. This type of camp site is the best of both worlds, you can camp via tent/car and still have a cabin like experience via the sheltered cabin.
In September it is still pretty warm in Tyler, humidity was 100% when I visited without rain. I'll visit again in October when the cooler temps arrive and undoubtable have an even better experience.