Right, it's "per day" so 8 hours is a good guideline.That works, we just need to specify in what amount of time (is it that quantity per hour or per 8 hours of continuously searching?).
Also, will 1 pound of food sustain 1 person for 24h? I’m assuming so.
Ps: there is perhaps a food finding hack using the find animal or plant spell. For your consideration @quickleaf
I'd say if you're traveling in a way that's conducive to reading track & sign, following creek beds, digging up potential root vegetable beneath the frost, following meandering animal tracks to see what they ate recently – i.e. not traveling by dogsled, not traveling as "fast pace" – you could do this as your "Travel Role" over a journey of ~8 hours.
This is the automatically successful bit thanks to your Outlander background. So foods like... snowberries, hares, weasels, rock moss, juniper tips, pine needle tea, roots preserved beneath the frost, (and if you're near a lake maybe cold clams).
Yeah, the 5e guideline is 1 pound of food = sustains 1 person for a day.
Yeah, locate animals & plants would help for sure, but the hunt then isn't an auto-success so a check/hunt would be involved. The plus side to doing it the "long hard way" is that a knucklehead trout can weigh up to 50 lbs, and game like bear, elk, reindeer, or even mammoth (or dragon ) can provide a lot of food – even if you assume only 1/2 of the carcass by weight is edible.