Casa del Sol is a good park. Typical of most RGV snowbird parks. Very clean and up to date. We spent several weeks there over the last two years. Further east is Kenwood Rv Resort with an indoor pool and minutes to Harlingen.
Victoria Palms has a wonderful pool, jacuzzi and gym with a beautiful club house, no beverages allowed which I don't understand but the sites are a bit rundown.
We have enjoyed Retama Village-Bentsen Palm Rv Park but it is a bit expensive for us. Very nice amenities and the birding center is right there. They have free bikes to take to the park which is nice for exercise and they have a good gym too.