I wouldn't stress it too much. Sustainability extremists will make you feel guilty for eating a diet of wild berries -- you're pillaging the bird's food. It so

I wouldn't stress it too much. Sustainability extremists will make you feel guilty for eating a diet of wild berries -- you're pillaging the bird's food. It sounds like a pretty cool adventure that you're having. My first reaction was "15 possessions and no pan?", but I can understand that in context of the travelling that you're doing.