I believe you may be talking about Sauger because saugeye' s are not very common i may be wrong but i believe this is true. I have fished the mississippi up and down and in 7 years of fishing for walleyes and saugers i have caught only 2 saugeyes. In general I have caught the saugers in shallower more sandy flats and the walleyes in the deeper more arated waters. I have also fished Mille Lacs which is considered by a lot of people to be the walleye capital of the world. We have had luck on lakes using slip bobbers running 8-10 feet with a minnow or a leech. We have also had luck trolling at night with deep running stick Yo-zuri lures, you got to have yo-zuri nothing compares trust me. Most of the times you will catch the fish off weed beds sand flats and rocky areas. we catch our fish in the early morning, at dusk and during the night. During the day we have found walleyes/saugers/saugeyes less active so we usually muskie or smallmouth fish during that time. Oh and its not illegal to keep Saugeyes in Minnesota i am positive of it.