SNRUB,
Reading above you say that you had plans for PK shrimp and went light or not at all on the crayfish. Did the PK shrimp plan work out? Do you see them? Do they enter your minnow traps? Would love to know how they survive with predators, who eats them, and where you see them (maybe you only see them at night with a strong light?) You would think they would struggle to survive with so many panfish predators.