Are we talking Resica Falls as in the scout camp? my sons ( both Scouts) and I ( a Scout Leader) do very well there, in fact I need to remember my permit renewal. Be sure to keep an eye on the ground my sons have discovered arrowheads there on more than one occasion.
That's the place. I was talking with one of "managers" of the area about 10-12 years ago. He took me around and showed me a lot of the trout stocking techniques they use. I was impressed by the "canal or pen" they have that off shoots out of the creek. It's like a holding pen for the stockies. They keep the trout in there for a period of time which acclimates them to the water, water temp, natural food, current, etc.. After a period they open a gate and release them. He swore this was one of the reasons for the success there ... I believe him.
They also do the regular stocking from the stocking truck but I believe the "canal" method , though a longer process, is the reason for the success.