How to safely keep your Apple devices charged off-grid

The weekend is already planned. Campsite booked, bags nearly packed, kids counting down. However, before the car is loaded, there is one question worth settling.
How do you keep everyone’s Apple devices running when the nearest power outlet is hours away?iPads for the kids during the drive and the downtime. iPhones as the map and the only line back to the outside world. A MacBook for work that probably cannot wait until Monday. That is a lot to power without access to the grid.
A Portable