I am in B.C. now, and have tried checking out what you were looking for i.e. some sort of barge that could deliver your van to a remote beach. The general consensus here is that probably the easiest way is to put the vehicle on the ferry and get it to the general area (Prince Rupert or where-ever) and then find a local short-haul barge or landing craft to take it to your desired local destination. The big barges that ply the main route (Johnstone Strait-Queen Charlotts) are apparently too big; and being towed by tugs, not set up to maneuver into or onto the shore. I hope this helps. I'll be here for another couple of days if there is some other local knowledge (or lack thereof) that you need.
2008 RB 50 Pueblo gold, Diesel, 4X4, Aluminess