When I hiked those trails it was in the 70's and before (the ADA established in 1990 on their website). The Ozette-Cape Alava trail was very simple and flat, and could have been negotiated without the boards by a wheelchair and a friend to help (two places I can remember). Even on the boards it would have been a teeth-rattling experience. And, once arrived at Cape Alava there were no boarded trails to La Push, and, not flat. At that point there are miles of trails up and down the beach, no facilities other than tree limbs to hang packs (higher than 12 ft. mind you!) until you get to La Push.
It did have a well-established trailhead at the ranger station, which we didn't need since all they wanted to do was confiscate my slingshot (protect seagulls).
And, if I had driven my friends to that trail and couldn't go on it, I wouldn't wait around for them, rather, would drive other places and see the sights.
We can only speculate on what is now ancient history. Know what I mean?