Are we going to have a big role-play event when Gammaton is revealed?
Unless this doesn't make sense to a story you already have planned, I already kinda have a story for how a few people will know about it:
Pip Kiro and Alek Fischer were getting rather tired of the unnecessarily dangerous life of the survivor base, and they talked about it a lot. Pip was often seen causing a fuss and yelling at the survivors about their dangerous habits. Alek and him agreed that the best thing to do would be to leave, so at times Alek went off looking for a new place to call home. He didn't have much luck finding a place, but the two weren't the only ones who wanted to leave. The group quickly grew to 6 people, but at the ideal size, they're now secretive and exclusive.
The search came to a halt due to Alek's death, but Pip later picked up the search again. While he was exploring he saw a town in a little valley, but he couldn't explore it as he was running out of materials, and he was alone. From what he saw, the town had around 20 buildings, and some walkers on the streets, but no survivors. Just what they were looking for.
Pip is now on his way back (I return next time I join) and he plans on taking a few days to prepare for the big move.
This is why I'm so excited :D