Michael Martinez over at Xenite’s Tolkien forum wrote us his thoughts about why the film might want to use Island as a backdrop, if indeed that’s what was happening at Titahi Bay last week.
“Going by the literary story I would say there are only three possibilities:
1) Tol Brandir. I consider this unlikely.
2) Tolfalas. Possible, but nothing in the literary story occurs there.
3) Tol Eressea. Frodo sees it at the end, and in a dream in Bombadil’s house.
My guess is they are using it for Tol Eressea, probably for the end of the third film.”