With regard to your minnow forage stocking, I think because you already have predators in place ... delay stocking until temperatures are warm enough to for spawning. Just google whatever it temp that is. Right now, consider adding some spawning substrate. Something like dense brush (eg cedar) in the shallows. Denser the better to make it more difficult for the predators. I would favor a strong stocking, the way Sunil has done, this allows them to get good spawns off before the adults are consumed by predators.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers