May fishing weather, Minocqua!
I wouldn't worry about late ice, but if you are, pick that second week in May. That may actually be better as the Saturday and early Sunday crowd from opening weekend will be long gone. Lakes may be a little less crowded.
I always see the lakes empty around 2:30 on Sunday of opening weekend.
But if you want to fish muskies as well as walleyes, I'd look at that second week in June. Weeds are coming up nicely and muskies are post spawn and usually eating in the weedlines, along with walleyes. Crappies have spawned and may also be in weed lines. That was always a good week for me up there.
Either way good luck to you. Hope you run into a mess of fish.
Do a bit of research on the different types of water and compare those to the trends of years past focusing on water temps and how they might vary from system to system. Then when you are there fine tune your approach so that you are lined up with a temp "sweet spot" and go from there. There are lakes within a few miles of each other around there that might be 10-15 degrees different than another one just down the road. It all depends on recent weather patterns.
You called it buddy! we're going to try it then, late May! See what happens, Squirrel Lake! You ever fish it? We have, a few time! Any tips on the walleye, we did not have a lot of luck and it's a killer walleye lake, go figure? crappie, very good, smallies, great northern, a nice muskie on, back in Ink Pot, nice fish! but not many walleyes at all? Thanks again! The Kid!