For what it’s worth, we used to get a lot of them in the weeds in Uram Bay. Crappie minnow under a slip bobber. It’s been a long time since I’ve done it, though.
I don’t have it, but check out the current issue of Field & Stream. There’s a short one pager from a guide that talks about targeting them on Mille Lacs during the summer. Just thought it might help?? Gregory