Best way to unlock Rock Chuck?

[RedHaze1911]

So i just got to the Iron Mike camp. I know i have to look for marauder camps and kill em. But do they just come up as the story progresses and i just keep playing as normal, or can i just get a cheat sheet n go to their locations and kill em faster?

[WeirdScienceX]

You can look up the locations and go directly there.

Same with the SMP9, kill a few hordes and that unlocks.