For your first question, would you regret not going? Because if you would regret not going, then that means you should go.

Well, you could have a found costume. Just something made up from what you have at home. I'm toying with the idea of being a witch. My high school graduation robe is a deep green and would rock.

And, http://ytak.livejournal.com/201986.html . That link has the photos I promised you. I wish I could get better lighting but sometimes it isn't doable.