Please welcome Eyoyo Underwater Fishing Cameras.https://amzn.to/3siEgXn
Time for a game cam...
I don't get it. They know that it's a good spot. why don't they just toss a trap in like you did?
Put a note inside a ziplock bag that says smile for the camera.
Game camera all the way
Unfortunately its to open and no place to hide one, (YET). Next year a different story.
You planted a tree?