Deep-water lake trout feed best during the day, presumably when they can see the best. Shallow water trout feed best during dusk and dawn.
Most deep-water trout are caught on tip-ups, but you need a lot of line on the spool. Use smelt or cisco or suckers.
You will also need fairly heavy fishing line-preferably 25 to 30 lb. line on your tip-up.
In early season, the fish will be at mid-depth 50-90 feet down.
Late in the season trout move shallow.
A favorite for ice fishing trout is called an ‘airplane’ jig. This jig covers a lot of water as it’s jigged and creates just the right movement that attracts lake trout.