I may be mistaken, and welcome anyone correcting me if I'm wrong, but I think they are part of the Winter Stocking Program as a strictly put-and-take fishery. I'm pretty sure the water there gets too warm in the summer for any trout to survive once the weather starts getting hot. And according to the TWRA website, the last time they stock there is in mid-May. By the end of July I wouldn't expect there to be any trout left there to speak of. But I might well be wrong.
Fly fishing - it's cheaper than a bass boat!