I packed the following and found it more than adequate in most circs:
1 spare battery & charger
light manfrotto tripod
various small accesories
Although for the future I'd probably lose the 70-200 and the tripod and the laptop (CF cards being so cheap these days!)
All was packed in individual cases within my right hand alu pannier. The pannier had about 2 inches of soft foam glued into the bottom. The pannier took several drops and two actual crashes, becoming quite dented and none of the gear develpoed a problem. I laso rode on rough roads and in terrible weather but the box proved quite resistant to water and dust.
Having said that I wouldn't have attempted a river crossing with the box on the bike.
In the future I plan to keep the DSLR with the 17-35 in a peli case top box and any other gear in my pannier. There is a theory that a top box, due to it's position, moves more than a pannier therefore increasing the effect of vibration but I'm not convinced it outweighs the fact that a top box is less likely to take a hammering in a crash. Your kit is of sufficient quality to cope with a fair bit of vibes anyway.
I agree with others that to go light is the way to go. If you've got too much crap with you it slows you down and makes you less likely to just sling it on your back on a quick trip to the shop to get some water, which is when you see THE picture of your trip!
I'd also reccommend a quality compact digi camera to keep in a pocket of your biker jacket etc. for those shots that come up unexpectedly. It's also less intimidating if you're taking pictures of people you don't know very well (or at all!)
*Disclaimer* - I am not saying my bike is better than your bike. I am not saying my way is better than your way. I am not mocking your religion/politics/other belief system. When reading my post imagine me sitting behind a frothing pint of ale, smiling and offering you a bag of peanuts. This is the sentiment in which my post is made. Please accept it as such!
Last edited by Matt Cartney; 20 Dec 2007 at 14:51.