Although I've never openwater fished the area I've stayed at Northland Paradise in Temagami. Walking distance to the town on Cassels Lake. Have caught lake trout, whitefish & ling thru the ice. Always enjoyed my stays but it has been over 15 years since I was last there. The lake also is said to have bass, pike & walleye. Same owners as the last time I was there.
Best Wishes: Rick