Millhouse wrote on Aug 31^st, 2012 at 7:18pm:

A question for those with experience in the area... Do the crayfish vary in colour from lake to lake or is there a typical colour?  I've seen orange-brown to green in my travels and I'm wondering if there is a dominant "hatch" in the park.

Without answering the question specifically, I will say that a #7 Shad Rap (Rapala) in red pattern jointed crayfish is a killer bait for walleye on rocky points and shorelines where you would expect to find crayfish. I have not had as much success with the other color crayfish patterns like green and brown.