4Corners, I always enjoy reading the updates on your puddle!
Have you tried introducing some gambusia (mosquito fish)? They might survive predation sufficiently in your FA and brush piles to create a sustainable breeding population.
With your available water have you considered a tiny brooder or grow-out pond? A pond as small as 1/10th or even 1/20th of an acre might be useful to you and fairly easy and inexpensive to construct.
You could raise golden shiners in the pond and then transfer large loads over to your main pond. Or you could introduce some YP and hand feed them. You should be able to get reproduction and then transfer some adults over to your main pond.
Just a comment on Mr. Cody's idea to trap GSF. I sometimes put minnow traps (baited with dog kibble) in my creek just to sample the species. Frequently in the summer, I pull traps containing ONLY GSF, even at times when there may be up to 10 fish species in the creek. IMO it is quite possible to selectively trap to perform some culling in your pond.
