First check with conservation department on legalities. If legal, my first approach would be to catch half dozen broodfish and stock them into a pond with a good forage base and no bass. Other option I can do in farming setting is to noodle taking egg mass rather than father. Then incubate egg mass and spread brood out before they start feeding on fish to control losses to cannibalism. A friend of mine that breeds flatheads says cannibalism is still the biggest bottleneck to raising them them. I assume release is into private waters, not waters of the state which in most locations is now illegal unless you are the state.
