Technically we are staying a BWV for 4 nights in 12/07 but our plane doesn't arrive on the 19th until 11:15 PM and we leave on the 23rd at 9:00 AM so we are really only there for 3 days. If we purchase the DDP, will it have to be for 4 days or, since we arrive so late and leave fairly early, can we get it for only 3 days.