Originally Posted by Jay
I don't think him being very detailed in describing Innisfree means he's ever been there. It could have been any other island. How are you, from that description, to figure out he was talking about Innisfree if he didn't 'hint' that in the title and mention its name in the poem?
I think the poem might be about a dying man. He might be dying for real or from within, I don't think it's of much importance which. His Innisfree might be his picture of heaven. It's peaceful and calm and he seems to be trying to get there for some time and for a reason he can't get there, be it it's too far away (if we're thinking about the actual Innisfree), or out of reach if it's only a dream, an image (a symbol of peace, heaven, whichever you prefer), as if he's dying he won't get there no matter what the location of the island is (that is if you don't believe in an afterlife).