Solving the quantity problem was not that difficult. All it took was brush. No, not the painting kind. I mean piles of cut bushes, tree branches and plant debris piled high into a big mound. Piles of brush were bundled together, bigger than a couple automobiles, and put in the lake. We tied 'em all together with baling wire, added big rocks to sink them, and dragged 'em out to favorite spots in front of our island home. Every two or three years we'd sink brush piles in about 30-40 feet of water out beyond the ledge and wait. The wait was about a year, a suitable interval for the pile to start to decompose, for the fish to find it and for them to feel at home there.
We knew exactly where we'd put those piles of brush by taking bearings off shoreline features. That way we knew just where to anchor our boat in subsequent years for the best fishing. Other folks would typically head for the waters close to the ledge, but that wasn't the ideal spot. We'd catch dozens of yellow perch, and other good eating fish, right around those sunken feeding and nesting spots. I don't think the other people had a clue as to why we were doing so much better than they were.
They probably don't do that today. Some environmental restrictions probably preclude that natural way of creating fish habitat. We thought it was a great idea, and it worked like a charm.