I have to go to the spring creeks over in Missouri to fish trout (about 200 miles one-way). They have the same set-up ... a hatchery right on the premises and they release daily. I've seen 10+ pounders cruising the stream, but they didn't get that big by being dumb.
They're usually spooked most of the time due to the number of fisherman working the stream, but occassionally someone is in the right place, at the right time, with the right bait.