If you go this route, you might want to just call the hotel. They might be able to add the lower rate room to your existing reservation.
This might be the best approach. At midnight the lounge is closed and club level guest services are also gone, so there will be no special benefit the first night. You could check-in at 6:30AM (they might be there at 6:00), with club level guest services (6th floor, near the lobby elevators). You will be issued keys and can use the lounge immediately.
Early check-in will give you the best chance of getting your requested room. Make sure to let the CM know the view is more important than the room being immediately available (assuming that is true).
The CM will not tell you the room you will receive, however it is printed on the small form you must sign. So it the location is not what you requested, try to change it while checking in.
Your request should be similar to: "Park View, High Floor, Near the elevators adjacent to Napa Rose"
Many rooms that match this description are Premium View Club Level, so you have the best possible chance.
Late checkout is generally only until 1PM (if available at all), and rooms are often not available until 3PM.
Bell Services will hold your luggage if there is a time gap without a room. They will pickup and deliver to your room, do not waste time in the Bell Service line in the lobby. Also, let them know the bags are being stored for a room change.