First off,
Northerns taste delicous, almost as good as walleye. When ever we go to the BWCA we always fry up a northern or two. The trick to it is fillet them into 5 fillets. Two from over the rib cage, two from off the tail, and one off the top of the tail. If done correctly you get 5 boneless fillets and better fishing than wall eyes. I just saw some pike spawning in a crick near my house. Only a couple feet of water but there they were in a sandy weedy eddy.