How did they get seperated and lost? No clue.
While some of them had their radios on and with them, some of the others had no way of communicating with them.
It made it harder to communicate especially with Ben since he doesn't even speak, so a radio is nothing to him. Taylor and Tyler are seperated, so Tyler's desperately trying to find Taylor and praying she's okay, praying he can do something if she's hurt or needs help. Taylor's worried sick and also trying to find him just as desperately, but to no avail. She has no radio either so it's useless to try and communicate for Tyler, who has a radio.
Ashlyn is trying to listen for them but she can't. She can't hear phantoms either though so that's...good? It means nothing's going to kill her but that also means she's nowhere near the others. Aiden is off in a tree trying to search for them from above but he couldn't see anything. His radio was totaled so that was no use.
Logan was making sure his guns were good and loaded, but he worried for the others who didn't have the guns because he had them all. His radio was working so he was talking with Tyler, but they were far from each other so it kept cutting out. At least they know they're not hurt. But that's really all.
Aiden is mainly trying to find Ben before anyone else to make sure he's not hurt and so he can be with him since Ben always does what Aiden does and he's not good being with himself. They were barely an hour into the night and they already got lost. Great.