For the pike and musky, big and flashy is the order of the day. Large bucktails work well. There is one marketed as "Musky Killer" that I have caught pike with (no musky here). Spoons also work well. Since the lake has not recieved much pressure, I would start with the classics: Five o' Diamonds, red and white Daredevle, and shinny silver. Buy a variety of sizes.

Many folks also use very large rapala type lures, but i don't have much experince with them myself.

That mix sounds odd to me.. Haven't seen a Canadian lake with that mixture... usually muskies and northerns don't mix and you may have to discover which are really in your lake. And they both eat all the bass available so you usually are wasting your time fishing for bass in competition with these big guys. At any rate, a red and white Daredevil will get the pike, I would forget the bass and fish for them in more southern lakes (like the U.S.). If you only have muskies, check the locals for good muskie plugs... I like big dark and hairy.