Quote:

The question came up in the context of planning extended canoe trip of 3+ weeks

I took one food pack on my 21-day spring trip and came out with enough food for 2-3 days and DIDN'T catch many fish. Could of went another 7 days IF I was eating fish everyday.

I make up my own food, combo of off the shelf and some fresh in the form of whole wheat tortillas/ venison sticks and Baby Bell cheese. I don't pack light and I had 3 liters of homemade "snake bite" medicine which isn't light.

Look for food that gives tho most complex calories for the weight and pack smart, you might not need to cache at all?