After a disaster, we all know that local communications will run the gamut from dicey to non-existent. When you arrive at a new destination, take a moment to find a location reasonably close (a full-day’s walk or less) to your hotel/Air BnB/hostel/other center of ops where you agree to meet your travel buddies if you get separated and can’t get in touch with each other electronically.
Put a paper map of the area into your day bags. Highlight a few different routes for getting to your meeting point. You can also have a backup pdf of the map on your smartphone.
Bonus points if you call this area your Rally Point or Muster Area so that you can sound like a real emergency preparation badass.