If you pass through areas with canister requirement you need to have a canister. You cannot guarantee you are not going to be forced to overnight there...by weather, illness or injury.
I admit that I have only been casually following this discussion, but I need something clarified here:
The above statement makes it sound like a dayhiker would need a bearcan if he/she were in the Zone? (because something may happen and turn their dayhike into an overnigher?)
