I am sure your lakes are frozen by now, but next fall once the lake turns over, try trolling deep running lures like grandma's, Big Ernie etc. off of a drop(parraell and perpendicular). Ideal is to find a flat with a depth around 15-20' then immediately drops off into deep water 30-any depth. The big ones like the deep water in the fall.
If you can use live bait there. Tip-ups are a fun way to fish pike. get some 4-6" suckers and find a weed bed that is located near the drop off. We usually fish in the 9-15' range. drop the sucker to where it is about 2-8' off the bottom on the outer edge of the weedbed(depending on weather front) or 1-2' above the weeds.
During the summer the Big pike like the cooler water. Troll the deepest holes 12-18' feet down where ever you see baitfish on your depth finder. While trolling use "S" patterns and give your rod a pull at random times to simulate a dieing prey fish.
Mntman
"Hunting is where you prove yourself"