How much enthusiasm do you have for hiking long distances while pulling or carrying a bunch of ice fishing gear? One way to get access to high backcountry lakes is to ski or snowshoe into them while carrying a hand auger (with the blade well protected) and a minimum of ice fishing gear in your pack. You'll need to figure out a way to protect your ice fishing rods in or on your pack. It's tough to haul in an ice fishing sled to a lake unless you get access to the lake via a snowed-in road with a fairly level roadbed. Sleds don't handle sidehills well.
Another way to get access to high backcountry lakes is to snowmobile to them or near to them. You can pull an ice fishing sled with a trailer hitch behind a snowmobile on relatively level snow-covered roads.
In the Clearwater drainage, examples of backcountry lakes which can be reached via snowed-in roads are Clearwater Lake, which is north of Seeley Lake, and Spook Lake, which is south of Placid Lake. A fun combination trip in the area south of Superior is Diamond Lake and Cliff Lake. You can snowmobile into Diamond Lake on a road, and then ski or snowmobile up to Cliff Lake, which is real scenic. Another combination trip is to snowmobile on a snowed-in road up to Bunyon Lake and Meadow Lake, which are west of Lindbergh Lake, and then ski up to Skylark, Eagle, and Beanhole Lakes, which are on the east side of Lindy Peak.
Many lakes are far enough back from a trailhead that you would need to do an overnight trip, which would be tough on foot because you'd need to carry both winter camping gear and ice fishing gear. An example is Grey Wolf Peak in the south Mission Mountains. But if you have a snowmobile, you can haul in a big sled full of camping and fishing gear, set up camp, and fish for a couple of days. I have an eight-person four-season dome tent with a propane heater, stove, and lantern which I use for trips like that.
