Luggage and bags:
Don't make the same mistake that I did, and carry over a large back-pack, take the smallest bag that you feel you can carry. This will make things easier and quicker when you need to move around.
Clothing/Shoes/Weather Gear: Clothing to buy over here is very cheap, compared to North America, so keep in mind that you will be purchasing some things here. So, take as little clothing along with you, knowing you'll find some good bargains. And it will keep the weight down and your pack/s less bulky.
Photo Equipment: With the era of the digital camera, this has made things lighter & easier. We don't need to carry multible rolls of film anymore. If you plan on shooting a huge amount of photo's, consider purchasing an extra GB card for your digital.
But if you also like to still use your regular slr camera (film) be sure to take your extra rolls of film along in a clear see-through bag. A monopod, and or tripod is always a very good idea, this will ensure that your photo's are guaranteed to be sharp and in focus.
If you enjoy shooting with infrared film, you'll need to take your change bag, filters and extra rolls of film
Miscellaneous: It is a good idea to carry some small padlocks with you when you visit. It's just a little extra security, then your mind will be at ease.