That was awesome. It's even funnier when you're old enough to remember when it was true.

I don't have a dynamo but do have a solar panel and did a 2 week tour this summer completely off the grid. Depends on the locale and season though. I did another 3 week tour with it and only had 3 days of sun.

For a short tour I just use a storage battery. Longer tour near civilization storage battery and charger. Off the grid battery and solar panel but I wouldn't sneeze at a hub dyno either.