When on holiday, particularly abroad, I want to be able to carry my cameras without it being obvious and a target for an opportunist thief.
Three years ago when on holiday in Jamaica I bought a 'Bob Marley' bag to carry everyday stuff you need on holiday, including a small camera etc,
I found out that I could fit the inner part of my Billingham Hadley Pro in my 'Bob' bag which gives the necessary protection to the cameras in it without advertising what you are carrying.
Perfect !