If you ever get a chance to pick up a UVS (underwater viewing system) - do it.
I orginally bought one to learn to read my electronics properly, but have really come to enjoy having it on board with me.
More then one time, when a structure stopped producing fish, I would drop the camera to see exactly what I lost on my baits on. More then once I was met with a structure full of fish.
Then there was that time a group of anglers I know found a blowdown stacked with fish.................with no takers.
Just because you aren't getting bit, doesn't mean they aren't there.
That's why they're called active and inactive fish. Everyone can catch active fish - that's why there's so many "pros" in the spring. It's the inactive fish that draw the diehards out.
You've set a goal, which speaks novels about the direction you are headed. (look forward to your pictures this July)