To add to the fly list - pick up some small poppers - like a #8. I like white or brown/copper. These small, panfish-sized poppers are a classic for Texas reds. It's a lot of fun to watch them suck one in - any they make a great pattern if visibility is off and you need to search or when the grass prevents decent subsurface retrieves. Also, small white poppers when there are lots of shrimp up shallow work really well.
If you find some green lights, that can make for some fun night fishing.
Oh - more than any other place I've fished, there are lots of "false positives" on redfish tails in TX. For whatever reason, the mullet there like to get real shallow and often have part of their tail up out of the water. Between the blue tint at the end of their tail and the hope that you see another redfish, it's easy to waste a lot of casts on these guys. It's one of those things - when you see a red, you know it's a red, but when you see something else, you think it could be what you are looking for.
Good luck - and give us a report!
Best,
Jason