Torjus,
Well, if someone were to hand me a bow, vs an atlatl I would go for the bow because it is something that I have used and am more familiar with. I am not however practiced enough to use one for hunting anything but large, dumb, animals
I have read, from several sources, that the action of throwing a spear with enough accuracy to hunt is more easily aquired, for a novice, than shooting a bow. I can't speak about the atlatl from personal experience, but having watched beginners try to hit a straw boss from 10m with an arrow, I wouldn't be surprised.
I think you are mixing your situations a little. If it is a survival situation, and you are close enough to find baling twine, do you need to hunt, or could you not just walk to the farm? If you happen to be carrying the twine, see next paragraph...
Lastly, I have been following Stuart's excellent articles and talks about the body's energy needs and when combined with my experience of hunting, I would say that trying to build a bow plus all the trimmings, even a really basic one, then go hunting with it, would be a very poor way of meeting your dietary requirements.
Trapping is more efficient for getting food. I don't see any need to learn bow craft as a "survival skill". Making and shooting bows is enough fun that I don't think it needs to have any false tags attacthed to make it worth doing. I just reckon that if you are going to do it, do it properly, or not at all. What is the point of showing youngsters how to make a "bushcraft survival" bow, if the whys and hows are neither bushcraft, nor survival?
Anyway, its probably better not to pay any attention to me on this. I have already been told that I have a rather unique
way of looking at this sort of thing.
xairbourne,
Whatever you decide to make, be sure you have practiced it, exactly like you will demo, before doing the demo. There is nothing so disconcerting as trying to make changes on the fly with a group asking questions!