As promised, here are some pics showing what happened when I based the ghost version of the H.P. mini.
Notice the larger stones on the base, and how they kind of sit in a rough circle.
I did NOT manipulate the gravel in any way, just covered the base in white glue, and dipped it into the gravel.
Sometimes real life can be a little scary, too?
Of course, I glued the flock in a circle around the edge of the base to enhance the effect, but still...