We stayed at park for overnight stay on the way through town. My wife and daughter had doctor's appointments the following day. It was fine for overnight stay. WiFi wouldn't work that night, but worked fine the next morning. Staff was friendly and allowed late checkout for $5 fee because wife's appointment was next afternoon. A little traffic noise as it is right next to loop, but was not a problem with air conditioners on.
We had a blast at Pecan Park Riverside RV. The staff went out of their way to make sure this was an enjoyable stay. We were in a shaded spot with plenty of room. Bathrooms were clean with private room for toilet and shower. The park rents tubes and provides a shuttle service for $15 a person for unlimited rides for 24 hours. The shuttle drops you up stream from the park for about an hour and fifteen minute slow float down the river back to park. We went into San Marcos for tubing, but after one float with crowds we returned to the slower pace at the park. It got crowded on the weekends, but it all does in this area.