Most people will fish Malcolm Island in that area - can be incredible salmon fishing, especially end of July area. Watch for the Sund Lodge boats in general (odd shaped, hard to miss!) if you need to, but the main spots - Lizard Point, the slide (1/3 to Lizard from Donegal Head - obvious slide on shoreline), Donegal, Black Bluffs (my favorite) and obviously Bere/Malcolm heading west. You can catch halibut trolling the bottom around the slide. There are often big salmon caught right in Mitchell Bay as well on the west side of it, then also infront of the kelp beds on the east side towards Donegal (lodge boats often sniff that out first light or on their way home). Other than that, Flower Island off Swanson also good as well as Baronet Passage (although haven't fished it but assume around Cracroft). You can also find halibut chicken ranch on georges banks if you anchor up (straight north from black bluffs) and I even caught my first hali ever right in the middle of Cormorant Channel where the ledge comes up.
You wont have any problem finding boats...can be pretty busy, especially if US exchange is good as it is popular with the Americans.