Access is average in the sounds. Quite a bit of private land there.
You could try fishing the keneperu sounds, you might catch a snapper. Can be quite slow.
The inner queen Charlotte sounds the fishing is slow, you might get a snapper.
Although personally I would drive out towards French pass, out there from the shore you would have a decent chance to catch Snapper or Blue cod from the shore. Maybe even a kingfish.
Generally the further down the sounds and closer to the open ocean you get the better the fishing is likely to be.