The other thing I would add is that if you're happy carrying the extra stuff then you don't have to cut it down as much as possible - it doesn't weigh that much or cause you to need a bigger pack, and especially for anything safety related I reckon you're better carrying a bit of extra stuff and not needing it than leaving something out and then thinking bugger, that would have been useful.
I take a lot more gear for a full day than if its just a few hours in the morning, because I'll be a lot further from the car or help if something goes wrong.
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