Luggage and bags:
Take what you want. A backpacker's luggage will be different from the rich group-tourists. A rucksack small size for trekking ... with some food supplies and a bottle of water.
Clothing/Shoes/Weather Gear: Walking can be a great relief and is the best in the late dry season when clouds protect you a little from the intense sun. You'll need sturdy footwear for support through the mud and rocks. Lightweight clothing, hat/cap, sunglasses ... maybe a raincoat if used to it. I guess a rain-shower can be so refreshing ... (well, take care of masuk anging, getting a cold)
Toiletries and Medical Supplies: Make yourself a small first Aid Kit (included scissors, insect spray, stomach upset, headache-pills, anti-biotics for skin infections etc.) and bring always a bottle of water ...
Photo Equipment: Your favourite tested photo-equipment as usual, extra a telephoto lens (some TAU-TAU are quite far away), bring extra battries, and digital memory, an adaptor you'll gonna need. You'll gonna take more pics ever you'll plan. People love having their photos taken ...
Camping/Beach/Outdoor Gear: Sun-protection, suntan lotion !!! Wear a cap/hat, sun can be too much. And a flaslight/torch in case you get caught walking at night ...
Miscellaneous: A hot item to take out to distant villages on the long walks are cigarettes, salt, dried fish, sugar, and betelnut as friendly offerings. Better donot give out candy like the most tourist do; it'll ruin it for the rest of us and the Torajans can hardly afford dental bills ...
Luggage and bags:
Backpack for backpacker as usual :)
Clothing/Shoes/Weather Gear: Cotton tee-shirts and comfy trousers [I like using my 3/4 capri and sometimes cargo pants]. Plus trainers or sneakers and flip-flop.
Toiletries and Medical Supplies: Panadol for headache and tamarind candies while trekking plus sunblock.
Photo Equipment: Recharged your battery for digi-cam. It's truely necessary when you're going outdoor for a whole day [in trekking]
Camping/Beach/Outdoor Gear: Baseball cap
Miscellaneous: ~ Again, sarung is an useful thing for any kind of conditions. Bathing by the river, it works. Feel so sweating and get super shiny day, it works also :)
~ Then do not forget to bring a torch for hanging graveyard and funeral caves. It's a must or you can not see the skeletons very well.