On portage trips I used to take a cheap soft sided cooler in a Duluth pack, but I found just wrapping frozen meat in zip locks, then wrapped in newspaper and stuffing it into a bag, then burying it in the Duluth pack works just as well for a couple/three days.
When I camp with my wall tent, no portages, I take an old tall cooler that fits a Duluth Pack day pack. Stuff it with frozen meat, good for a week of solo camp.
When I camp with my wall tent, no portages, I take an old tall cooler that fits a Duluth Pack day pack. Stuff it with frozen meat, good for a week of solo camp.