The prospect of musical version of Mark Twain's The Adventures of Huckleberry Finn had to have been, at one point, ridiculous to imagine. Thinking about it, one might have expected lessons in history and literature, high school tedium brought to life onstage. Also, a story that is largely locked to a space the size of a raft isn’t exactly going to lend itself to the song and dance treatment. Indeed, when such a musical arrived on Broadway in 1985, people balked at the idea and critics weren't exactly enthusiastic. Interestingly enough, Big River turned out to be the hit of the season, running 1,005 performances and winning the Tony Award for Best Musical