My pond is a year old and has lots of crayfish as I get 20+ of them every time I pull the cloverleaf trap I use to catch bullheads. Enough crayfish that I am wondering if I should be pulling them out too since I am trying to get plants and fish established and won't have a bass big enough to eat them for a long time.
I did not stock them - I assume they came from the local creek drainage. Perhaps you already have them and don't know it? try a trap with chicken livers and old dog food. If not, perhaps there is a local creek you could trap them in to stock. That way you would not be transporting a crayfish that isn't already in the local area.
What kind of crayfish do have in your pond?
