Put me down as a maybe. I might come as Remilia, Reimu or Nitori. Not sure yet, all depends on the money. As for ideas, how about a picnic? If you get enough people I'm sure you could incourage people to bring their own food to support this. As for music and dances, do you have a portable CD player? I could probably snab one from my aunty if you don't have one.
Also, maybe a Friday meet-up could be arranged? If you can't do that, I could do it since I know the layout of the ExCeL now. Regardless, if you need help or anything just give me a shout. :3