If you've never read his accounts of traveling in Russia, do yourself a favor and read it. It's fascinating to read.
I thought about those stories when I saw those "unauthorized" North Korea photos a while back--naturally, the photographer was dragged to the local arena to watch people doing mandatory exercises.
People ought to give some of his later works a read, too. Never make the mistake of thinking the author is just writing about their own personal beliefs--what would that say about the writers on Hannibal or Game of Thrones, anyway?--but his later works, though colored by his libertarian leanings, didn't paint the future as a libertarian utopia. In some ways, his later books are both libertarian and dystopian.