Another variation on this is to put beef jerky in a food processor (before the trip) and reduce it to something that looks about like coffee grounds. Store in a zip lock bag . Put the ground jerky in with the amount of water you need for your instant potatoes. Heat and stir in the instant potato mix.
That reminds me, here's a "Good Eats" episode on how to make beef jerky:
http://www.youtube.com/watch?v=aJfuVl0BBlA It also talks about making beef stew from beef jerky. I haven't made either (I don't own a box fan, or a dehydrator). But it sounds delicious.