I got 8 at Red Rocket Garage (made my home base a settlement), 2 at Ten-pines, 9 at Starlight Drivein, and haven’t fooled with Abernathy Farms, so they are still 3. Haven’t done the alleyway.
>>I got 8 at Red Rocket Garage (made my home base a settlement)
I’d bet that Red Rocket is getting your settlers that you want in Sanctuary. They all have to walk past it on the way. I saw 2 walking in to the drive-in a couple days ago, so they don’t just appear. They travel.