Leica S2 as Travel Camera

I read with great interestMark Dubovoy's accountof using his S2 in Africa instead of the usual big lens DSLRs. By sheer coincidence, I have been out of the country too, putting my S2 through its paces as a travel camera on a workshop in Western China and I thought I'd share some of my experiences - listed here in no particular order.

Lens Choice
I gave a great deal of thought as to which of the four lenses to take. It's nice to have a bit of 'reach' so the 180mm was a contender; the 35mm was a no-brainer, and that left the other two, the 70mm and the 120mm. Taking all four was not an option because, whilst the camera itself is not heavy, the lenses are relatively bulky and contain a lot of glass. All four, plus the body, would have cause potential hand luggage weight issues on the multiple flights I would be taking so I decided to take just three. I ended up taking the 35mm, 70mm and 120mm macro - I left the 180mm at home because whilst I thought I might need the extra reach...