As an update to this topic, I have some pictures of my flexible solar setup posted to my website here:
Take to the sea: Cheap and complicated, just like me
The solar setup is at the bottom of the page. I recycled a lot of the language, but it shows that I came back around to a lifeline-mounted solution, which seems to be working well so far (so far being about 12 hours).
Let me know what you think!