Ok, so gluing up railings was inspiring... so I decided to take another look at something which froze me dead in my tracks.
That cool drone footage showed me that the end of the ferry slip wasn't just a simple set of pilings lashed together:
Spent some time scrubbing back and forth on the video, and found that my friend managed to capture a full overhead view:
Probably going to check and see if Archer Transfers rivets can be used to model the topside bolts (http://www.archertransfers.com/AR88053.html?). I think I'll used HO Scale NBW castings for those side bolts.
I've started making more 3D CAD to enable me to carefully cut and glue more plastic together: