Lets not let the thread go in that direction. I've found the people in the more rural areas along the coast is very friendly.
For the crayfish jig, I know some locals use it on kalkay harbour wall. It basicly a sinker with about 10 hooks at the bottom of it. bait will be placed inside this ball of hooks. When the feel the bite they'll pull it up. Cant find a picture of it now, but will look.
It is not a very effective way of catching crayfish, ill rather take a snorkel, mask and some stockings. Put your bait into the stockings and leave it a while. Check it later, and pick off the crayfish from it. Their legs get stuck in it.
Don't think these methods are legal.