This won't help you at all, most likely. However, I grew up fishing northern MN/southern Ontario, most of the time on Lake of the Woods. When we wanted Northerns (which was typically only when lakers or walleye weren't cooperating), the standard rig was something red/yellow or red/white. Spoons and spinners were popular.

I'd tie up a bunch or Clousers or Decievers in red/yellow and red/white, probably size 2 and 1/0 mostly. Poppers may be a bunch of fun as well. I used to love trolling along cattail beds casting a Lil' Devil spoon along the weeds. Northerns are an impressive fish when they strike.