Caberfeidh wrote: Best to keep your food inside tupperware so the smell doesn't get out and attract them.
Yep, had mice a couple of times attack my food stack.
I agree that in theory it's maybe not best to keep the food in you rucksack, as they will eat eat through the rucksack to get at it, however after many nights wild camping, and only a couple of mice, I dont bother myself usually. My bag will generally not be completely closed at the top any how.
Irt tupperware, I've also known mice to take it on as well to get at food. Sealing it is one thing, but if there are any food reminisce on the tub, they know where to go.