Near future scenario:
We've seen LaPush and Neah Bay close access to the non-treaty share, because they're located on reservation land. So maybe Sekiu needs a permit to repair their pilings or ramps, and it's denied based on similar obscure objection. They deteriorate or are deemed unsafe and close. Now there would be no public launch or water access from Pt Angeles to Westport. Makes for some nice, private fishing grounds.

As a US and WA State resident, I'm so fortunate to have sovereign, federally secured water I can access. Oh wait...that was yesterday.