Given the lack of response to the poll, I think what I'm going to do about the packing party is just run it over the four days next week before the movers are supposed to come. If you want to help, come by any time after 5 PM, grab a box, and start loading. If you have a tape gun or dispenser laying around from a previous move of your own, by all means bring it along; I have a couple around here someplace and will be getting some more from Uline or WalMart. We'll pack stuff for 3-4 hours and then I'll order in some pizza. Reload, regroup, and repeat until Friday.
Let me know in comments or e-mail if you think you'll be able to drop in for part or all of the festivities.