harpers is a great place to take kids, catch all the perch they want, as for trout, they are all planted and fishing isn't that good.[except when the put the brooders in.] perch should be bigger in about 2-3 years.
As for coopers, all I ever caught in there are suckers, axcess sucks. that lake needs killed off and planted with bass and crappie and catfish.
To each his own, I like walleye, pike, bass, perch, ling, catfish.
Not a big fan of trout.