Some necessary personal stuff:

Please use bags, which are easier to store, instead of suitcase.
Foul weather gear.
Waterproof boots 1 or 2 sizes larger (for more socks).
Wool or thermal socks.
Cap
Gloves
Thermal shirts and pants
Warm pants (2).
Polar sweater.
Sleeping bag (no feathers).
Sun glasses.
Solar protector cream.
Slippers.
Small backpack for trekking.