Well, it seems that you are on the right track for having a good BG pond so long as you keep your walleye. Good BG ponds rely on an overpopulated/stunted predator species, typically bass, but I would assume walleye would work too. Take out all the predators that are big enough to eat sizable BG while maintaining a lager population of smaller predators to keep the BG from overpopulating and stunting also. I don't know a thing about walleye. If they don't reproduce in ponds, you may have to ladder stock them to keep their numbers up high enough to hammer the BG YOY as you remove the larger ones. There may be another more available species you could use for your predators up north, but I can't comment on that. LMB would certainly be a good tool for your BG pond along with the walleye, but skinny predator fish may be all you get either way.
