Kanna may not have packed for an extended trip...but Link has. In fact, Link is packed for an extended trip all of the time.

He shows absolutely no concern at the possibility of being stuck out here for an extended period of time. In fact, there's almost a positively cheery air to him.

And right, they are still wet and cold - so he pulls out two Spicy Pepper Steaks. He holds one out to Kanna. If she takes it, she'll find that it is somehow still piping hot, like it's just been cooked. Furthermore, eating it will make her feel warm even in the cold weather.