When visiting the parks, I always set up a landmark with my party to meet up at in case we get separated and one of our cellphones runs out of battery. The key is that we pick a more obscure, less visited landmark, so that it’s easier to remember and easier to spot the other person among the crowd. Some examples: Fire Station at Magic Kingdom, Miss Piggy fountain at Hollywood Studios, Club Cool at Epcot, and the entrance of Pizzafari at Animal Kingdom.