awww sweet!
good idea.
well most of my tools are medal, so i dont think i have to wory about them depleting much, but here are some things i would do i guess:
water filtration:
i would take a bucket, or hollowed out stump, a vew feet in length, and fill the bottom with 1-2" rocks then put dirt over top of them, and pour the water through, as the earth is a natural filtration system. (not sure how well that would work btw)
string:
well sooner or later we'll run outta fishing line, or bow string and paracord so:
if you peal the bark length wise as many feet up as you wish, and take your knife down the "green" wood of the inner part, you can create strands, braid these strands together, and you have string, more braids, rope, the more strands the thicker the rope.
which if you dry out the string/rope to where theres no moister, then you take some and get the amount you wish to use wet, hang one end inside your bucket (or water holding device) and the rope will act as a syphon, filtering the water through the rope.
food, you can make rock fall traps n catch mice or squirrels, or snare traps for bigger game.