I'm strongly considering an attempt at trapping crayfish from my local creek that is less than a half a mile from my pond. Is there any concern of bringing anything bad into my pond by doing this? I figure these crayfish being this close will make their way to the pond eventually without my help anyway. My goal is to get some crayfish in the pond before they lay eggs in order to build a population in advance of my SMB stocking. Is this worth doing? Will the crayfish reproduce in the pond or just go back to the stream?

My plan is to use a minnow trap and increase the size of the hole in the trap and bait with beef liver. Anyone have experience with this?