Hillsilly reminded me of a few key accessories you'll want to take for travel:
A cable lock (the type they use to lock skis). It's cheap, small, and light - and you can creatively wrap the cable to lock spare gear in Armoires, drawers, etc (this will become your white-lens lock - because after awhile that's what will be left back at the hotel/hostel/etc). If someone really wants your stuff, they can cut the cable... but people won't know what's in there - any you'll immediately know if someone broke in. It gave me piece of mind. And never store your spare lenses in a convenient bag with a handle... that's too easy for a thief to grab the entire kit. Store stuff in big piles so a thief grabs one or two things and runs.
Gaffers Tape. You want to disguise your external hard drives - make them ugly; the last thing anyone would ever want to steal. That's the problem with digital... in the old days, at least no one would steal your film... but now, hard drives and CF cards have value. I considered spraying my hard drives with the same stuff they spray under cars to prevent corrosion... but it's sticky. Gaffers tape and primer spray paint was my solution. Also, get an online backup service... I uploaded my treasured jpgs there... at least, if everything was stolen, I'd have the jpgs. Internet cafes also typically have a DVD burning service and you can periodically mail discs home to yourself. And always have two hard drives... a backup, and a backup of your backup. One of my drives went 'click' one day, near the end of a 4 month trip, with 10,000 images on it. And that was that. (Luckily I had a duplicate drive and lots of backups).
I also put black gaffers tape over the logos and the red rings on my camera when I'm in high theft areas (Gaffers tape is expensive, but it is designed for film gear and doesn't leave a sticky residue). Honestly, I'm not sure it really helps - a thief will steal a camera regardless of value... but it makes me feel a little better.
Sensor blower (e.g. Rocket). Either bring one, or you'll end up buying one on your trip.
A discrete bag. I used a Domke 803, and it holds a body with a 70-200 f/4 and a spare lens... and looks like a little messenger bag. I just switched to an 831, which is a little bigger... but haven't put it to the test yet.
I assume you'll have a compact camera as well... you better. Many of my BEST shots came from my little compact... because it was always in my pocket. But... I dropped into the Antarctic ocean while trying to climb an iceberg to get a shot of a penguin... which taught me to not use my cards to store images... get them off as soon as possible.
A Wolverine drive works well for that... and if you are on an expedition where someone got a great shot of you, you can always ask 'can I borrow your SD card for 5 minutes? You can slip their card in your wolverine and grab all their shots... and it counts as one of your extra hard drives... and doubles as card reader.
Bring SD/CF recovery software. I didn't... and I met way too many people who lost everything on their cards and were staying up all night trying to figure out how to recover their images. Some of the memory cards include recovery software for free... bring it and save it on every device you have.
anyway... hard won lessons from the field.
Thanks, this is all very helpful stuff from board members. Getting a camera bag is the last thing that I will get once everything is finalised. Im not sure about getting a leather bag as it is a bit slow for my style of photography. I meant that I walk around, going to places quite fast and I travel with a daysack. Im thinking of getting some photography bag that is light to hold all my equipments INSIDE the backpack and it will stay in there the whole time. So it acts as:
1) a bag that seperates camera stuff from the rest
2) just for protection against my backpack thrown everywhere during a tough 6 months trip on chicken buses.
Im thinking of getting a smaller protective bag so just to fit the camera with 24-70 lens. And I till but that in the day sack when Im out during the day. Im not a fan of those sling shot bags, it screams"rob me" and the zips are too accessible. Also it is very bulky and takes up volume in the backpack.