It's a tough call to get water access: As the park is car accessible that means lots of pressure and easy use by all - likely negating water access especially as that is by a difficult rocky shore. As well, the one area hilited would be the best for all users for some form of water interaction. Or a very exposed location to put a dock for dock access.
I think it is far better to put our hopes into Apodaca as it has minimal land access [private property surrounding] and a much much better landing spot, and materials are on site:
Difficult Cape situation - this is the shown water access location:
from the water:
I think on the landing:
It's quite bony and I think they'd spend millions putting in a pier, breakwater, or dock in this location.
and an earlier conversation here showing where a slightly better location is just 100m east - but as it is close to the boundary, probably not desired by the park:
Unfortunately minimal usable water access, so for general info only: Metro Vancouver is proposing to spend $40 million to preserve part of a spectacular site that was being developed on Bowen Island...
where there is some form of beach: