TerraCycle is great for recycling packaging from dehydrated meals as well!  I've actually mailed myself empty Backpacker Pantry bags to send in and they've added Mountain House as well.  It would be great to have local drop offs where everything could be dumped in to go to them rather than having the footprint of sending mailers back and forth for each company separately.  I feel like I need to hoard a bunch of snack bags and things before sending them in and I don't buy that many big box items.