Ha!! I wasn't clear. The camera will be fixed focus. I thought I'd start by focused on infinity. Over time I can try moving the lens to get a reasonable hyperfocal setting. I meant to use a scrap piece of photo paper to set the focus one time only. After that I would be putting unexposed paper into it inside my changing bag.
Yes trying to focus on "live" paper inside the camera would be an extreme challenge to say the least!
Oops. Don't forget a viewfinder, the wire-frame type works well.