Those are not the right boxes. The ones I use have a 2" thick Styrofoam box inside the cardboard box. Freeze the meat/ fish rock hard. Then into the Styrofoam & tape the Styrofoam lid. Then tape the cardboard lid close. It lasts from ANC to the lower 48 with not problem. Boxes are about $15/20 all over Soldotna.

There is one processor there that will pack, freeze, weigh & store your fish/meat till your ready to go.