What about people in my Peaceful Place? How do I "use" them or how do I let them go
You must take control of the situation in your Peaceful Place. If you want people in or out you invite them in; you tell them to come in and stay, or to go out. If they persist and won't go, then build yourself another Peaceful Place. You can bring people in and seek their assistance and guidance by asking them questions. Try it, you'll find the power amazing.