I'm putting together a touring build for my first long tour (~2000mi). It will be primarily "stealth camping" and I'm concerned about plug availability for charging for my phone and gps. On the other hand, getting a USB charging system with a Shimano dynohub looks like it'll be $200-$300, which is more than a month's rent for me. Anyone have advice in regards to whether or not a dynamo hub would be a worthwhile investment? Sorry if this has been covered already; I didn't have much luck searching the forums.

Thanks in advance,
~Nick