I have heard a lot of good things about these adventures, but never got the chance to play/run them. Now my FLGS has parts 2 and 3 of the individual modules for $5 a piece. They also have the mega-adventure for $30. Which version is better? Is there anything extra in the mega adventure that is cool? Just wondering which might be the better way to go. In case it matters, I am thinking about using these with Castles & Crusades, which I have recently picked up and am being won over by.