Yeah, for short trips a power bank is likely the way to go. But I usually get a couple of week-long trips in each summer. Hopefully my recent shoulder injury will be healed enough to do it again this year. A buddy of mine and I have a spot where we will hike back along a string of mountain lakes camp at one of 'em about ten miles in. A light weight solar charger would be handy for topping off batteries for flashlights, GPS, etc.