I would love to go to an alien planet, because, if it is earth-like, then there may be life there and I would love to finally know what real aliens look like. Though, if there is no life there, I would still be happy as I would still be on a planet that isn't earth and that in its self is worth something.
As for things I would take with me, they would probably be: 1. My camera 2. Some drawing equipment and 3. Some books to read.