As Andy pointed out, a #2 fish/frog gig ($2-3 at most outdoor stores) is an excellent way to feed yourself and requires very little skill other than patience.
Put 2 small wood screws in your kit to affix the gig to a shaft as these gigs are usually drilled with 2 holes near their base. I duct tape the screws inside the hollow of the spear. Cover the exposed barbs with cardboard/duct tape to avoid injury.
Just like anything else related to harvesting most wildlife, check your local fish & game laws BEFORE testing.
"Your Honor, I was only practicing my survival skills!" will probably not let you off the hook (so to speak).
I've been thinking about this specific point. It certainly makes sense to have such a tool if you have the space, but I have before done some fishing in South Africa with a sharpened stick into which I cut "barbs" with my pocket knife. Call it a home made spear. I guess my point is that I could add a lot more to the kit, but in reality I would like to remove a lot from it. Everything adds weight.
I guess it's something to think about some more...
