Halibut like hard rocky flats or plataues. They like to lie near the edges and feed into the current.Look for this type of areas on charts of the area. I dont fish that end of the straites but this type of bottom works well off the coast and near the west entrance. In a good halibut hole off westport you can expect a fish within seconds of hitting the bottom. I have heard there are some humps near the east end that produce nice halibut but not like the bite you might expect from swiftsure bank or off the coast.Hope that will give you some help.
Mark