I tend to carry the following:
Canon Mark II
Canon 20D
Sigma 24-70 2.8
Canon 70-200 2.8
Canon 300 2.8 NON IS
580 Flash
All of above will only be in bag at the same time during transport.
Very good chance that both cameras and the 300 2.8 plus Sigma will be in use at once.
However, I probably won't have the 300 out of I don't need it.
Any suggestions?

