It does not sound like "fishing" is the primary goal of the pond.

Is "family recreation" the main goal?

If so, then a few triploid (sterile) grass carp and annual spring stockings of tilapia might also be part of your management plan.

You would probably need to start with a fish kill treatment to make sure there are no large catfish or bass that will eat your small tilapia after stocking.

Below is an old link about tilapia that has lots of comments from people at about your same latitude.

Tilapia for Algae Control

That thread is over 10 years old, and the experts on Pond Boss know a lot more now!

Note that you will have almost total control of your tilapia population. They will die off 100% in your pond every winter.