I suggest you jig, under these circumstances, for perch. Then, pop their eyes out, rebait with the eyes on a rapalla or sweedish pimple & say a little prayer! You should get a few walleys if they are around. You could also put any small perch back on your tip ups (if you use them). They are good bait for just about anything else, as they are natural food for that lake. I have gotten bigger perch, pike, pickeral, walleys and trout that way. Just remember to count the perch in your take for the day. If they won't stay away, use 'em. That'll teach 'em!
HWN