A sarong is invaluable!
by TracyG
A backpack will come in useful and is the easiest way to carry your things.
Malaysia is pretty hot and humid all year round, so light weight clothes are a must. Also, take at least one pair of long trousers for trekking in the jungle (to keep the leeches at bay!) A pair of walking shoes/boots as well as a pair of 'Teva's' will also be handy, and a good set of clothes for nights out.
Depending on the time of year and area you go to, anti-malarials may be neccesary. It is also a good idea to take some re-hydration sachets with you.
Kuala Lumpur is another great place to buy camera equipment, so you will have no problems here. But near enough anywhere else you will also almost certainly no be able to find what you need - stock up before you leave......
If you have a feeling that you would like to sleep out, under the stars, then take a mosquito net.....!
A water bottle and torch will...