You’ll want the batteries to last as long as possible, so be conservative with your device usage. There won’t be much need for most of the apps on your phone, nor will it be necessary to constantly be on social media or taking photos/videos. Remind your kids about this ahead of a...
Do you try with an FRS/GMRS radio, amateur radio, satphone? Which frequencies or channels do we use if the first ones are busy? What are the backup plans, and what are their schedules? Do you have a template for a plan? You can get one for free here. Along with a realistic and ...