The Star Ferry routes were always much better that a harbour cruise.
That Kalanggaman Island sounds like a great place. More research for me there I think
I'm surprised you haven't heard of it Peter but to be fair I think it's only a household name on islands close to it such as Leyte & Cebu. I've heard you can reach it from Malapascua Island as well as Palompon but don't quote me on that.