This is a very interesting thread. As is always the case, the gear lists change with user's attitudes, skill levels and fitness level.
In early September, I went on a 3 day backpacking trip in the Rocky Mountains near Calgary. Each day consisted of: 10km hike with elevation gain of 650m, 12km with 650m gain/650m loss, 15km last day was descent. The elevation at the camps is about 2300m above sea level.
The weather was forecast to be cool, complete with sun, cloud, rain, sleet, snow, ice and more frozen sleet. Temperatures ranged from -5C to +12C. Tent was covered with ice in the mornings.
For gear, I carried the following:
fox 40 whistle (carried on person)
1/2 of a two man tent c/w with fly and ground sheet (shared the load with partner)
MSR Pocket Rocket and one cannister of fuel (partner carried a spare cannister)
1 liter pot with lid
600ml plastic mug
one plastic spoon
1 - 1 liter water bag (collapsible platypus style)
3 - lighters (mini style) - one on me, one in FAK, one in pack
1 - folding spyderco knife (delica)
Petzel Tikka headlamp
first aid kit (fits into a 10" x10" x 2" plastic sac) contains basic needs with some extras like salt packs for making saline irrigation fluid, steri-strips,lots of tape and a SAM splint (the best part of my FAK)
8'x6' homemade sil-tarp (didn't even take it out of my pack, but I brought it so that I could lounge under it if the rain was really bad)
hiking pole (it does save your knees on descent)
35' of 2.5mm perlon cord
20"x20"x1/2" ensolite pad (for lounging on - my luxury item)
3/4 length thermarest
Suunto Observer watch with barometer/altimeter and compass
Clothes:
polypropylene shirt
poly long johns (top & bottoms)
schoeller pants & jacket
down jacket
goretex jacket & pants
very robust gaiters
stout boots
one pair wool socks c/w liners ( I should have brought an extra pair - but it was the one thing I forgot)
fleece toque
baseball style sun cap (I was being optimistic...)
sun glasses
silk balaclava
-10C sleeping bag
goretex overmitts
2 pair fleece mitts (thick and thin)
small tube of SPF 45 sunblock (rays off the snow are intense and burn the insides of your nostrils and ears)
4 feet of toilet paper (if you need more than this in 3 days, you wouldn't be able to bring enough anyway)
polypropylene gloves (thin liner gloves)
------------and yes, I did wear ALL of this when sitting around in the evening. No fires permitted on this trip
----------- while hiking I layered on and off all day (including changing out gloves as my hands and head/neck are my way of regulating my heat)
food:
dehydrated meals (plus one full extra day of food)
energy snacks, tea bags and sugar (my luxury items)
assorted energy bars
on this trip, at the trailhead after the trip I only had a single energy bar remaining
Total weight of all gear (including a liter of water) - minus the food - was 26 pounds. I did not weigh my pack with food in it, but would estimate that I had about 6-7 pounds of food.
Seems like an awful lot of gear, but note that most of it is clothing. That's the biggest risk on this particular trip. It can go from fall conditions to full-on winter in 2 hours.
I did not double up on anything, except maybe bringing the tarp along. Everything got used with the exception of the FAK.
I used a 60 liter pack.
My partner carried an 80 liter pack, full to the brim. Total weight had to be around 50 pounds.....to each their own I guess.
Cheers,
D