I am still in the planning stages of our trip to Las Vegas at the end of July/early August. I already have booked 6 nights at Ballys (5 nights comped, 1 night not comped). I received a mailer from the D with 3 nights comped, some free play, and food comp. So I double-booked The D for Tuesday/Wed./Thurs. nights. Will there be any problem with not staying the full 3 nights at the D? I've read to just leave the room key in the room when checking out early. Will this work? Any other advice on this plan?