Everyone has there own way of doing things and likes and dislikes. There are no firm answers here only opinions.
Canisters...If the WPS/Hostel doesn't have one the FS will. My guess is Elevations rent'm, too.
Overnight...One should suffice, unless you bringing half of Albertsons with your.
Bag...Down is best, warmer and lighter is a good combination.
Tents...I don't do tents with anyone other than wifey. Bring industrial strength ear plugs.
Food...If it doesn't taste great at sea level, it is going to be horrible at 12,000'. Bring good food, period. I prefer hot food at breakfast and at night. That's me.
