How can I keep my Ipod charged if I am going on a 3 month backpacking trip?

abigbrightshiningstar asked: Sorry if it sounds daft but I am new to all this technology stuff.

I am going backpacking around Australia for a few months and will just be living in a van and tent so won’t have access to a plug or a laptop or anything.

How would I keep my Ipod and mobile phone [...]