I use a bergen for carrying my stuff around.. yes, its bigger than me... but I can fit loads of crap in there! even got the removable side pockets too :) Not bad for free :D My boss paid £80 for it.. didnt use it so gave it to me.. comparing their £160 new.. not bad at all..
You could fit a family of refugees in there :D

The way I justify not wearing high vis and having a black bike is that there is little point in relying on other people to see you (I read in the police riders handbook that one third of all motorists will not register your presence as a motorcyclist! :shock: ). You have to ride as though you're invisible to everyone apart from police and speed cameras. I think wearing high vis would make me lax.
Plus it makes you look like a knobber.