Okay, I did the Kickstarter Collector's Box, it's supposed to come with some DLC items (I think, if it's the same as the Collector Box in the store). There's also the Steam Collectors Edition which includes the DLC.

From what I can tell, the version of the game that backers have is just the standalone, regardless of what they backed.

So...

1. Does the Collector Box comes with the DLC, so we should wait until we get that?
2. Is there a way to make Steam think that we have the DLC in this case? Almost seems like you can add the DLC code and then also buy the Steam DLC at the same time. I doubt the game will let you use both though?