I have seen guys shore wading in parts of the estuary . There is a fishing platform right next to the rt -3 bridge. Regs state no trebles and same river regs apply all the way to the first bouy at the mouth ( lighthouse ) on SR .
You can cast / use any type of general tackle beyond that and any pier such as L13 stated out into the lake.
I have watched plenty salmon jumping in the lake around the Selkirk Shores State Park pier . You can even night fish there as well. Try glow spoons ;)
We may just do that in the time I'm there over the next 5 days.
Good luck.
Ps. Agree with ya db.. My point was just when the salmon are running it don't matter much as long as you are fishing what I call good ( broken) water