When backpacking, canoeing or biking, I carry a holga. Or two or three. They are light, practically indestructible, and very affordable and replaceable.
Here is a holga show in nyc:
<x-tad-bigger>http://www.sohophoto.com/kk10_winners_gallery/index.htm
And one in New Orleans:
</x-tad-bigger>http://www.neworleansphotoalliance.org/
--shannon