It was exhausting (I walked about 7 miles around and around my parents' property) but worth it. The cake came together perfectly, all the sets and props worked right, no teenagers rolled their eyes at us or started drama, no one got hurt or had allergic reactions; almost miraculous, really. The Nightmare on Elm Street theme was a blast. My dad hates horror, but he still got really into it. My fingers are still stained from fake blood.
My phone is being obnoxious, so I'll post a few pics in comments.