Oh wowww... when you guys say loaded, you mean LOADED!
I have no idea how any of you ride for a whole day with all that stuff @_@ I'd fall over and die. Seriously, I don't think I can even ride an hour in some of those. Really nice bikes though ^_^
For my 600 mile trip, I think I'm planning to get by with just a small to medium sized rear panniers. I'm pretty sure I can do it, since I'm not planning on camping and I've fit everything I needed for a week on vacation into a backpack before (including my laptop, which I won't bring on tours xD)