I am a bigger fan of the books than the TV show, but I think they have done a really excellent job interpreting them for TV. I realize they have gone 'off the rail' and started moving away from the books already, but I expect we will see even more departure this season. Regardless, the story is moving towards some sort of conclusion. I'm curious to see what the differences will be between the books (whenever we finally get them) and the next couple of seasons of the show.
The barricade scenario became much longer and larger than I expected and is taking longer to write up as well. It will hopefully be worth the wait.