Do Trout live in Michigan anymore?

Okay, Im not sure what the story is with the Trout, but they must have recieved word that I was coming and left! That's the second trip with not so much as a nudge. I've emptied my box on them and tried flipping rocks and screening the surface to see what they may be feeding on. The problem is they are everywhere feeding off the top and "BIG" ones too and I can't find the formula. That's fishing I guess, but im not happy about it!! LOL.