Welcome MOAlan
With my track record as a fisherperson I have never considered fishing much for emergency food, altho I know that it can work.  I think that location makes a big difference, the more remote the water, the less chance that the little fishies have already tasted a hook. 
And some folks seem to need an Ugly Stick, graphite reel, spyderline, and some $10 lure.  Then there is the guy I met one time.  He had just come back from a week in the back country of the Sierra Nevada Mtns, and had caught his first trout (several of them), on a BARE hook, which was tied onto a four foot length of line, which was tied to a stick... 
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OBG