The only other time I've arrived in Vegas close to midnight was a few years ago staying at MGM and we got the crappiest room imaginable. We got one of the old, non-renovated rooms in a hidden hallway right off the casino floor. Every time we stay at the Mirage we get a crappy view, of the roof usually. Even when arriving early in the day. Our plane lands at 11pm on Thursday night and I don't want another crappy view/room. Have you had any success in calling the front desk ahead of time to ask them to pre-block your room? Did they actually do it?