Hello, I'm pretty green about RPGs (Level 5 of my first ever d&d campaign) but I've gotten hooked. I've been a Dresden files fan for years and knew there was an RPG but never looked into it. Basically I have two questions:

1. Are Your Story and Our World the only books I'll need to competently DM a campaign?

2. How involved should my players be in selecting a city, making faces, setting type decisions?