The camping trip wasn't miserable. I felt terrible about dampening the mood for my boy though...
Anyhow, here's what I did on the bus with my Swiss army knife:
I cut apart a sticker to make nail art. The pencil wasn't a pencil in the sticker, but rather part of a fan-like wire pattern. (I should have taken a photo of the sticker.) The cat eyes, back leg, and tail were dinky slivers of sticker. Not bad considering I was doing this on a moving old bus lacking good shock absorbers.
This was done before I started counting windows and getting dirty looks from the girl across my way.