Hey Doc, I managed to find just the right tool to make the job easy (relatively easy.) It's from Harbor Freight Tools, and it's their Serpentine Tool Kit.
Really, it's the long 15" bar you can stick a 14mm socket on and easily get to the bolt underneath the alternator (the pivot bolt.) Gives you soooo much leverage that you'll be amazed -- I nearly cried out of joy. $16.
Here's a pic of the tools I used to finish the job of changing the belt.
1. Put the 14mm socket on the 15" serpentine tool and remove the alternator pivot bolt entirely. Add anti-seize to that puppy and reinstall, leaving it loose enough to allow it to pivot.
2. Loosen the two 10mm bolts above the alternator (the sliding bolt and bracket bolt that holds the slide in place.)
3. The belt is easily loosened by moving the alternator. Take it off, but take note of how it fits on.
4. Install new belt, making sure it's seated properly. It's a little difficult to reach some of the areas it has to snake around, but take your time and position yourself however you need to in order to see what you're doing.
5. Adjust position of alternator (bringing it forward) to remove the belt slack. Should be around .3" slack, if you know what I mean. A new belt will be tighter than one that's been in use for even five minutes. .5" slack for used belt. Tighten all bolts at this point. I started with the sliding bolt, then the bracket bolt, then the alternator's pivot bolt.
6. Make sure you've gotten your tools and things out of the way, double-check the belt tension and start her up.
This did not completely fix my squealing problem -- it may be my water pump bearings, though it seemed to rotate without issue while the belt was removed. Oh well, I'm just happy to have conquered the bolt from hell, without completely stripping it.
Hope this info helps!