A dead snake is the best thing I've found for luring crawfish into a trap.
So many questions...
Seems like someone here at PB mentioned using snakes as crawfish bait but it's been awhile so I could be off on that.
I'm always trapping for BG. Water snakes love an easy meal so I wind up with drowned snakes in the traps.
Anyway, I had a dead snake so I tossed it into a trap and gave it a soak. The trap was stuffed when I pulled it the next day.
The next time I had a dead snake I tried it again - same result.
HIghly recommended.