Big Perch???

[PBH]

while technically not south of Fillmore -- have you ever considered Gunnison Bend, or DMAD? Or even just the Sevier River below Yuba?

Again, I don't know where you are located in southern Utah (St. George? Blanding? Garrison?). We don't have many (thank God!) perch fisheries, but there are a couple options that aren't name Fish Lake...