I saw the crane and wondered what its purpose was. I spent more time around the park this year than I have in several years and there are changes.
I could speculate as to why there are so many small fish, but I suspect it's a combination of things. No culling, deliberate reduction in size, and some escaping in the flood. I was told that there was a meeting where they said they would reduce the size in July and August to keep up with demand. I wasn't at the meeting and neither was my source, so take it for what it's worth. I do know that in past years if the water got high enough they would lose a few. They don't lose too many because the hatchery fish tend to hunker down during high off colored flows, or so I've been told by some employees I knew.
There has been a move as far back as the 80's to increase the attendance at BSSP without any regard for what the main attraction can handle. I know that in the 60's, 70's and 80's there were crowded days, but most people moved around and one only had to move with them. Today it seems that few move because they fear they will lose their place, or there are people fishing from the bank who never move.
In the end it will only get worse I'm afraid. They didn't tear out all the campgrounds and build condos, put in canoe rental, and buy up the hollow above the park and put in trails to let the park rest on trout fishing.