I've decided to abandon the Wikispaces site for Islands of War in favor of a new approach; I'm now doing my editing on a DokuWiki installation on my own computer, because I don't have internet access at home.
Eventually, I plan to setup a publicly available site for this wiki, but I've got a number of decisions to make first. Most likely, it will be a complete HTML backup of my offline wiki that I'll update from time to time.
So far, I find DokuWiki to be more flexible and functional than Wikispaces ever was. I miss the WYSIWYG (What You See Is What You Get) functionality, but I'm looking into plugins for DokuWiki that will provide me with this.
I believe all of the tagged pages are showing up in their respective list pages, but it's difficult to verify due to the lack of reporting functions I'm used to having.
I believe I have imported all GCS files (character sheets, templates and libraries) from the old wiki, with perhaps a few small exceptions.