I've wanted to run ToEE, Slavers, and Queen of the Spiders for some time now. My current group is composed of all post 1E gamers (some post 2E), so they have little interest in *my* nostalgia trip. You see, despite the fact that I've been gaming since 1984, I have never played those particular modules, and I am now bound and determined to do so, in AD&D, the way it should be done.
What I'm going to do, and what may be a farcical trip of the highest order, is to run ToEE across 6 events at Origins 2010. Unfortunately, I didn't come up with this "gem" until it was far too late for this year's show, but on the flip side, I have an entire year to prepare! If it works out, I would then do Slavers at Origins 2011 and Queen of the Spiders at Origins 2012 (the end of the world, dontcha know!)
I like the suggestion about switching up the elemental nodes. I may have to do something along those lines because, from reading ToEE, it seems like it might be difficult to do at a convention.