Thank you, Elehanna and Chie, for your suggestions. I'm currently thinking about archiving on Google, since I can more completely control access to the stories that way. A few of the stories we have been entrusted with were with the understanding that access would be limited and, if found pirated, they would be removed from all access.
Something tells me that I wouldn't have that sort of control with OTW. I understand their mission, why they exist, but I have to remember the people who let me upload their work when deciding where to post it. Who knows if they'd still object to unfettered access? Not me, but I'm not taking any chances, even with the stuff that hasn't been touched in over a decade.
I may, or may not, follow Danyealle-sama's lead and create a Facebook account for the group... I'm still mulling over that one. I'm not terribly happy with FB right now, so we'll see how that goes. We have until December to completely remove everything on the site, so I'm not going to rush this.
~~Wiccan~~