I fish Swiftsure out of Neah Bay fairly often in June-mid August. It's a great place to fish on either the Canadian or U.S. side. You can fish halibut on the CA side (outside of the RCA of course) for much of the year (if you have a BC license purchased in person in BC). You can fish salmon with just the online license purchased from your couch. As long as you don't anchor or "hover" close to another boat, check-in with the CA authorities is no longer required (the law on that changed early this year). Ditto for the return trip to the US side. If you're only fishing for salmon, the only real advantage of fishing on the BC side is that the regs allow more than one pole and there are usually differences in coho regulations.
For a real BC "experience", I think you'd be better off going farther N. Bamfield and Tofino have some spectacular scenery and fishing. On the inside and south my experience is that just like WA state, the fishing is not as good as it is on the coast so again, I think you're better off being N if your fishing from the mainland. Kitimat and the surrounding area can be spectacular and I have a friend who fishes there every year for several weeks.
Prawning is good in many areas and the seasons are longer than in WA. However, again unless you get away from the major population centers, the prawning can be slow. In WA near Seattle, we only get a few days of prawning but pots coming up with 100+ per pull on 1-2 hour soaks are common. You can find that in BC but generally you have to go farther N to get away from the places that are prawned hard by both recs and commercials.
That's just my 2 cents worth. I'm sure others can add to/correct this.