Honestly, few of us need anything electrical when we're touring. Postcards, pencil and paper, fuel, and you can survive a long time.

What do you want with a smartphone? laptop? camera? Is it worth it to pfutz around with batteries?

If it is, how much pfutzing do you want to do? You can turn off a smartphone when you're riding, and make it last quite a few days between evening calls home. Of course, then you need to find a way to recharge -- library, motel, diner, etc. all make recharging possible.