Big Pond,
I would stock fathead minnows, coppernose bluegill and redear sunfish in limited numbers and just let them grow.
I recall yur pond is rather large but there will be a population explosion in a new lake.

This approach can be achieved with less than the cost of couple of tanks of gas in my area.

If you are close enough to N.E. texas I will supply gratis from our forage pond.

If you are close to N.ER. Te