Great advice above.
I spent several months in MO for the Army and was able to fish a lot. Finesse style jigs like an Eakins in Green pumkin, black, and PB&J worked the best. Looking at the local craws like Tom suggested is how I came to start using PB&J. In both the Big Piney and Meramec the crayfish were brown with a purple hue. The craws here in Maryland are the same color brown but no hue.
Allen