I catch them at 1 spot of a flat rock ledge 60' X 150' .Look down & there they are. Clear water all the time 60 to 80 ? ALL are huge females and a couple of males.  Stay for about 2 hours then leave. It is TOO EASY to catch them there. I have put a small bare lead jig head on and started it down.  Up to 4 will race up to grab it.   Bingo C & R is not fun. That obvious is boring.  I have not done that in 5 years.

Too easy? Nope never encountered that 

Fish move? No, never...

We call that the "honey hole".

This is a spot that I bet @Chris Catignani fished in the 70s like I did.  The photo is from the upstream side of this bridge.  On the other side the water dropped about 18 inches when it flowed out of the pipes and was a smallmouth hotspot.   I caught numerous smallmouth below this bridge every time I fished it.  They were all small but I could have probably caught a hundred fish if I fished it all day.  I usually fished it for a half hour and moved on to less productive but new water.

I have a Honey in NJ in the Delaware.  ONLY during very high storm water flows. Right above the out flow of a small creek. Circular current. There will  ONLY be hundreds ?  of 12 to 16" walleyes packed in that tiny spot .No other species ever caught there. Until water drops down.

I see little EATING  enjoyment difference between walleyes & perch at that size.I C & R all of them.  Nice to have a spot like that during hopeless high waters everywhere.

Never had it so easy I found it discouraging, but I personally would create the world's greatest adventure Indiana Jones style for finding it, first clue in my will, make folks fly all over hell's creation and go delving into many of my favorite haunts to find the next clue etc to get information that valuable, probably culminating in wrestling a cave bear on Kodiak Island or something.