Hh23, I don't believe I've welcomed you yet, so, Welcome to the Forum.
I appreciate your out of the norm thinking, in this case, regarding trying a fish not necessarily held in high regard for ponds-yellow bass. And I totally relate to your consideration of the blast of ultra light or micro fishing for abundant, scrappy fish.
You probably have already answered the question in your mind of why yellow and not white bass for your pond.
You might find that over time the sluggish FHM cannot survive the predation of lots of yellows.
And, if your outflow from your new pond runs to other lower elevation BOWs, you may have already considered how to keep the yellows, including fry and fingerlings, confined to your top pond so they don't "contaminate" other ponds or streams.
If you don't find a source for purchased yellow, how about bucket stocking some from another Kentucky BOW?
I have no experience with yellow bass; do they taste as good as whites?
Good luck on this project, thanks for posting about it, and please keep us informed as you progress.
Roger