I have had good success in Dawson Inlet in the QCI for prawns.
http://travelingluck.com/North America/Canada/British+Columbia/_5935815_Dawson+Inlet.html#themap
Trounce Inlet for crabs
http://travelingluck.com/North America/Canada/British+Columbia/_6169222_Trounce+Inlet.html#themap
http://travelingluck.com/North America/Canada/British+Columbia/_5935815_Dawson+Inlet.html#themap
Trounce Inlet for crabs
http://travelingluck.com/North America/Canada/British+Columbia/_6169222_Trounce+Inlet.html#themap