March is the magic month of hardwater, from what I've experienced Schooling begins to happen again. Safety in numbers brings the whole school off bottom a few feet. March is the feeding month to prepare for spawn. Slip bobber and a minnow 1/3 way off bottom, if possible set up a couple people spread along the shore. You can see when they move through.
Melting ice = more Oxygen, tough time is lake turnover here they can be any where.
Fishassin