Since I'm just wrote the much more exaustive back country list, I thought I'd trim it down for hostelling.

Personal Stufffff

• ___30+L back pack   Ideally ~50L
• ___fall sleeping bag   Good for -10C
• ___flashlight/headlamp   including extra batteries
• ___toilet kit (toothbrush, toothpaste, deoderant)
• ___eating kit (spoon, fork, knife, bowl, cup/mug)
• ___pocket knife   Small folding or locking blade knife, blade about 3” long
• ___sun screen
• ___lip balm with sun block
• ___sun glasses or snow goggles
• ___water bottle

Inner Clothesssss

• ___1 pair of light socks per 2 days   ideally not cotton, +1 emergency pair if trip is less than 2 days
• ___1 pair of heavy socks per 4 days   ideally wool, +1 emergency pair if trip is less than 4 days
• ___underwear   you decide how much
• ___1 pair of long underwear per 4 days   just like pants
• ___1 pair of semi loose pants for every 4 days   NOT COTTON, +1 emergency pair if trip is less than 3 days
• ___1 short sleeve shirt per 4 days   not cotton, feel free to mix and match long and short sleeve shirts, I just like my options
• ___1 long sleeve shirt per 4 days   not cotton, nag nag nag.
• ___1 hoodie/fleece   something thicker and heavier, but not an outer layer

Outer Clothesssss

• ___winter boots
• ___snow pants
• ___gators   optional really, but keeps your snow pants drier
• ___1 puffy and/or fall rain jacket   warm, wind proof and can be used as an outer layer
• ___1 winter jacket with hood   warm, wind proof and water resistant/proof
• ___1 pair of liner/magic gloves
• ___1 pair of heavy gloves or mittens
• ___1 touque
• ___1 neck warmer/beleclava

Group Stufffff

• ___diaper wipes   could be personal, but we can share right?
• ___pots?   depends on the hostel, check it out so you're not screwed when you show up
• ___melt bag?
• ___water filter?
• ___first aid kit

Notes

• Never, ever, EVER wear your day clothes to bed.
• Put on a new pair of light socks when you go to bed, then wear them all the next day and put on new ones when you go to bed again.
• Plan ahead, if you sit on the toilet seat for 5 min before going, the seat will be warm on your bare bottom
• Or, a chunck of blue mat cut into a toilet seat shape works good too.
• The sleeping quarters for all Hostels run by Hosteling International have bunks with foam mattresses. Bankets and sheets will be supplied. Due to bug issues in the past Hosteling International no longer allows sleeping bags or pillows. They supply the bedding for no additional charge.
• The sleeping quarters for all Hostels run by the Alpine Club of Canada have bunks with foam mattresses. They do not supply bedding, so bring your own sleeping bags.