Leaviel
New Person

It'd be really cool if you could enter the cosplay competition too. I don't have any real ideas about how to make your costume easier to manuever on stage, but maybe if I tell you how I did it you'll get some ideas (sorry if this comes off as cocky or anything >.< )

You wouldn't happen to have any shots of what your mermaid tail looks like when you stand up do you? I ask because what I did for my Shirahoshi tail was that I made something that looked like ankle length skirt (altering a hoop skirt tutorial I found on a website) with a small opening on the bottom for my feet. After that, I made a seperate tail and I'm going to attach that to the back of the costume and then wrap it around my feet so that it looks like a curled up mermaid tail.

I don't know if this will help you get any ideas for your tail, but I hope it works ^_^' The Cosplay Contest also allows more time on stage for costumes that are hard to manuever around in.