Rednecks
Rednecks are a bunch of people living in Crater Rim. They're not hostile to outsiders, so you shouldn't be afraid to move amongst them. The most notable thing you can do with them is killing them and getting their moonshine for the moonshiner job.
Rednecks are armed with a variety of weapons. Even though some of them may have something as menacing as a chainsaw, they are not very skilled with their weapons. They're not a very big threat, but you shouldn't take them on too soon.
The easiest way to get to them is to use an osprey or a huey. Just go over to AP roof and activate the beacon, enter the vehicle and then just tell the driver you're going to Crater Rim. You'll arrive in no time. You can find the rednecks east from the Crater Rim helipad.