I think it is a given Hill and Smith get most of the snaps in training camp so I am not quite sure how they will determine whether to keep Davis or not.
If they only keep 3 qbs and Davis doesn't get time, why even bother drafting him? I doubt he clears waivers.
Is there a scenario where they keep Davis over Huard?
Hopefully Smith or Hill play so well that Huard is just seen as a luxury.