Take the guesswork out of which color and size crawfish to use with this inventive trick the bass pros won’t share by using a simple South Bend Crawfish trap. Stop at the local 7-11 on the way to the lake, and buy the cheapest, fishiest cat food you can find. Walk several yards down the bank from the boat ramp, because it‘s almost always a rocky shore, set the trap and leave it over night. In the morning, pull the trap and see the color to size of the local crawfish population, then match the baits and get to work.