When looking for an RV park east of Houston that accepted Passport America Rio RV Park on Turtle Bayou made my short list. We ended up stopping here after our drive from Austin. I did call ahead to make sure there was space available. The Passport America rate was $22.00/night.
The park is right off of I-10 near Wallis. A very nice husband and wife couple are managers. We were escorted to our site, and given a choice. We opted for a newly placed concrete pad, a back-in site.
The hurricane had flooded the lower level of the park. Our hostess said that four (4) units were swept away and the water level was neck high! Our site was part of the reconstruction.
This is a very nice park that is gated at night. Local over the air TV is more than adequate, and free WiFi is available anywhere in the park. The WiFi service is pretty good, however it did slow considerably in the evening. There is a nice restroom and laundry building. We recommend the Rio RV Park. Here is their website.