I have never seen a pond with reproducing bass have a sustaining population of FHM.

Your conditions may lengthen their existence in your pond, but they will eventually be extirpated... FHM eggs are a yellowish color. You should see a male racing back and forth. Male spawning FHM are very distinct and easy to see as they are jet black with a lighter colored "saddle" on them. They will be near the eggs keeping them clean, aerated and protected as best as they can from predators.

It is unlikely your GSH would spawn on the underside of a lily pad.