I am looking for suggestions for a simple setup to take pictures of the kids as they come to the house trick-or-treating. The effect I am trying to get is "spooky." I had thought of placing one flash camera right at 1/2 power, and another camera left behind the subject at 1/4 or 1/16. Maybe even from below the subjects. The equipment I have available is a Nikon D50, SB-800, SB-600, SC-17. I am trying to rustle up some gels or colored cellophane paper also. Any ideas? What would you try? Thanks in advance.