In my experience, commercial packaging and ziplock bags won't even slow down mice and raccoons and their toothy compatriots. They will even chew through the side of a pack to get at food stored inside. If you are not worried about bears, then you want to consider something like an Ursack or a hard sided container that is a lot lighter than a bear cannister. Or, you can always do a hang if there are trees handy. In my time, I have had only one problem with a bear, that was over 50 years ago, but have had many, many problems with mice since then. Mice don't eat a lot of your food but they leave mouse turds behind in the food that can sort of spoil your appetite.