I currently have 16 settlers in Sanctuary Hills and I went around to my other settlements to send them to Sanctuary but it is the only settlement that I can't send anyone to. Why? I have plenty of beds, food and water so what gives?

What is yer CHA?

Shoot. I'm only at 5....

You can use charisma boosting items such as suits, formal hat, black rimmed glasses, alcohol etc to get more settlers

Thank you!