I wear BMW gear, always. It's by far the best gear I have tried for different climates. I use an Aray helmet and Oakley goggles.
I had three panniers and one soft bag on my bike.
The waterproof soft bag was carrying all the camping gear and was used as a backrest when riding. The top pannier was carrying the tools, raingear, and other stuff I needed to access during the day.
The left bag was carrying my clothes,toiletry and my electronics (small Linux laptop, 2 cameras and all the plugs for everything).
The right bag was carrying my shoes, washing and cooking supplies.
I also had a tankbag and two small tank sidebags. The tankbag was carrying my maps, the GPS tracker, the paperwork, water bottles and so on. One sidebag carried extra water, fruits and chocolate, the other bag carried extra med stuff like blood clotters and so on.
My jacket was carrying my passports and id's (and fake id's), my emergency PLB (personal locator beacon), my iphone and, of course, some more chocolate ;O)