If Carlton have any sort of inkling that a player of Bartel's quality will be in the pre-season draft (and they're going to have a lot better idea than you, I, or bee_dee) they will make room, they'd be stupid not to. Not only because of the onfield aspect, but can you imagine the backlash from supporters if a ready made, quality young player like Bartel went into the draft and Carlton had to pass because of their salary cap?
The only way we'll get Bartel at pick 2 is if there's someone better at pick 1.