[regomodo]

For camping surely an old nokia will do? I keep one, which isn't much bigger than a mars bar, for this purpose and the battery lasts for ages.

[dagw]

Sure, I do the same. But having smart phone features like e-mail and a web browser would no doubt be handy at times. For example looking up bus/train schedules for getting home in case you end up delayed or have to change your route.