Canister fuel usage
For those wondering about "how much fuel do I need", I'll give you my last trip's stats. I use a PocketRocket2, and a 220gr Coleman canister (I believe these are 70% butane/30% propane, but I'm having trouble confirming that). The temps were generally 40-50F while I was using the stove. My elevation was all less than 1000' MSL. I heated water to not quite boiling for 8 dinners (8-16oz each), 9 breakfasts (6-12oz each), 3 desserts (4-6oz each), and approximately 136 oz for coffee/hot chocolate. I used 113 gr of fuel.
And, as always, keep in mind that YMMV.