I wouldn't say you need to do a CAI. In fact if you think you might see any water crossings, I'd leave it alone. (We just don't see the same dust they see out west so that's not even a concern for us) Unfortunately there are horror stories out there about how quick Chrysler will void your warranty based on one. If anything, you may just want to consider a drop in K&N filter and keep your stock box.
If you do decide to go for it anyway, just hang onto your stock intake and swap it back in if you do have any warranty work.