I have resisted posting because I have nothing elvish to discuss, but with the sudden arrival of Hallowe'en boxes of trick or treat goodies in stores, I suppose I might be allowed to mention this.
A Shelob costume, with which I delighted the little ghosts and goblins last year: black, long-sleeved turtleneck and black pants. Face covered in black makeup, with red rings around my eyes. Short black witch's wig, with messy hair and black "witch" fingernails on my hands (which I also painted with black face paint). AND three large black feather boas, arranged around my body to suggest six legs. The boas did not shed too much, and I was able to move fairly easily.
I did have netting and tons of those little plastic spiders hanging all over my door. And every so often, if we knew the children at the door, someone in my family might jump out with a "phial" to scare me away so he could hand out extra goodies. We had fun.