It definitely said nursery water in the article so one would think it's the big private side. They do have some huge fish on that private side of the lake that are used for breeding stock. I've witnessed them bringing captured fish into the hatchery for milking and they bring in some hogs ! They really have a nice setup for transferring those fish from boat to tanks. I think that display tank is a cool thing to witness since fish are changed out steady. I use to take my kids up all the time and see what kind of fish were on display. The fish always appeared healthy everytime we were there, and I'm not sure but I don't think they leave them in long before they swap them around. When you can keep big Trout in that tank healthy looking I'd say the rest should have no problem.
I also agree over handling of fish does stress them bad and could jeopardize their health. So yea maybe special trophy fish like that should be left alone soon as possible.
One question I have had is how do they control the huge Carp numbers on that side ?