The standard KAQs will fit in an ~65L pack with four days' food just fine: they're about the same size as a pair of poncho liners when compressed, and I've fit two liners, the huge Hennessy Hex tarp, 5 L water, and all of the rest of my crap into a 65L with four days' food before. Note that this assumes no extra clothing aside from a poncho for rain gear, though; clothing is a volume hog. I stuffed the liners loose in the bottom, inside of a trash compactor bag.
Hope it helps!
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