You should check into this, I'm sure you can make some contacts at:

http://www.breauxbridgelive.com/

Breaux Bridge is the crawfish capital of the world, and besides farm-raised crawfish (on flooded fields), they fish "wild" crawfish in the Atchafalaya spillway. Also, there's a crawfish festival every May, here's a link to that:

http://www.bbcrawfest.com