Yeah Mustang Island State Park (located near fish pass) is OK.
It is kinda run down.
It has pads with water and 110
Security, a no drive beach for the kiddos and first aid. Its 15 min to a couple of stores where you can get some grocerys.
For some reason the water is a little cleaner there. Just north are two groins that have bars coming off both ends. Depending on tide,and swell direction size etc, It can be pretty good.