Dennis & Debi:
If you like state parks, there is a great one about 1/2 way between Port Lavaca & Corpus Christi. Goose Island State Park, about 7-8 miles north of Fulton - Rockport, Tx.
Goose Island State Park, we have stayed there numerous times. There are two separate campgounds, one is in a wooded area and the other is on/near the water. There is a fishing pier and if you are staying in the park, no fishing license is required. Only drawback is that if you stay in the wooded area, there is basically no cell phone or air card reception and TV is spotty. It is a great place and is usually quite full so you may want to call ahead or make reservations. There are several RV Parks or campgrounds in Rockport but again the cell phone and air card coverage is limited.
We stayed at Tropic Winds last year for 3 months, had a good time. Only complaint is the wind, but from what I've heard the whole valley is like that. Most of the spots run east/west and the prevailing wind is from the south. If you park near the rec hall area, be prepared for the sound from the pickle ball games. There are several golf courses in the area if you like golf. You should take in the Harlingen downtown tour, the guide does a good job and is entertaining. They also have "Market Days" which is about 3-4 blocks of flea market on main street. Lots of things to do in the area, too many to try and mention here. If you have any specific questions, feel free to ask.
Maybe we will run into you down there.
Paul...