Quick note on acne:
I bring a pile of those face wipes (different kinds of different brands) for different reasons to con. I have one that's an exfoliant to remove make up, one that has salic acid (YesToTomatoes) that I put on after, and in the morning I have a more gentle one to remove any left over make-up or dirt that got on me in the night from con (YesToCucumbers). I don't know if it'll help everyone, but since doing that, I've come out of con with very healthy skin, instead of more acne than before.