I like to have lots of small lengths of tent guy line. Very useful for all sorts of stuff.

I like both bungees and cargo nets, but with bungees I prefer multi-hook units like this: http://www.jackstoolshed.com/index/p...2+Hook-to-Hook

If your tent or backpack or pillow or anything else that you're putting on the back rack has a drawstring-type loop, run your bungee cord through the loop so that if the tent (etc) weasels its way out on the ride it will be connected to the bike and you'll know. Nothing worse than having to back-track for a tent that decided to quietly squirm out on you.

I don't like Camelbacks. The last thing I need is an object hanging on my back, creating a sweat point.

Otherwise, like others have said, you seem to have done your homework and are a heck of a lot better prepared than I was on my first tour. Bon voyage!