Thick jacket is a must!
Toiletries and Medical Supplies: Bring some motion sickness pills if u have problems with train / bus journey more than 2 hours... especially if u take a bus... there are many sharp turns that may make u sick.
Photo Equipment: Bring a tripod if u want to capture a non-shaking sun.
Miscellaneous: Sunglasses to protect your eyes from the glaring sunrise.
Luggage and bags:
a small bag for your own trash when trekking/hiking in the moutain,let's protect and maintain the beautiful area together!
Clothing/Shoes/Weather Gear: warm, better with goretex
No sandel in winter
umbrella , just in case
Toiletries and Medical Supplies: Some headache pills maybe, for it's over 2,200m high.
Photo Equipment: Of course! If you use DC, you can recharge at the hotel.
Camping/Beach/Outdoor Gear: If watching stars at night, maybe a tant is needed.Also a slleping bag, it's very cold at night in the mountain.
Miscellaneous: your mp3 player....no one can live without music, right?:P