Well having never fished Kab before I thought I should jump in and respond! (GB America) What I do know is crappies spawn at around 64 degrees so you might be right on it when you go. Thought I read that way up there they might spawn at cooler temps because that fry needs time to develope-anyway early post spawn they will be close to spawning areas which is a big advantage on a big infertile relatively crappie free lake. So anyhow crappies love to spawn on reeds, if reeds are everywhere (remember I don’t know) look for reeds near breaks with fertile areas nearby. I like reeds by mud cattail areas. No reeds? They will use wood or dock posts. Neither? Emerging cattails. Thats the formula (shhhh) reeds or wood, or cattails. Don’t spank the big ones up there because they take a long time to grow-but because they can’t be targeted well for most of the year you could eat a few slabs w/o too much guilt—-good luck