Here is what I'll contribute about Pymie. I haven't been on it yet this year, but a close friend has and was bass fishing. He caught bass. If he caught bass, walleye and panfish can be caught also. The lake is so large it takes knowledge as to where to go and what to target with the given conditions.
I'll add this. I fished Preque Isle Wednesday. Me and a partner brought home 65 panfish, a mixture of perch, gills, and crappie. The bay is further North than Pymie. Lakes here generally get better south to north as conditions improve from winter to spring.
I'll guarantee anglers caught fish at Pymie. They're just tighter lipped knowing that posting I'net info brings the masses. I love hearing "wait two weeks". Northern hemisphere fish bite as soon as the ice leaves, and while it's on. It's the savy and experienced anglers who capatalize on it, and keep to themselves on how to get it done.