After logging back in I got the message that my current location was occupied and I would have to be ported to my homestead losing everything in my inventory. It was the only option so I logged in and re-traced my path (running all the way, I hadn't really gone that far) in hopes I would see my newly-built boat and somehow get back onto it, but it's gone - not there anymore at all.
So maybe the collision detection needs to be tweaked somehow to prevent this from happening - I was literally inside the terrain itself maybe a few game-inches below the surface of the ground and unable to take any action at all to get out or move in any direction.
