I'm not certain exactly when the United desk is open, but I have been there as early as 5:30 AM and they were up and running. If you are *Gold or a member of the Red Carpet Club, you will be able to use any * Alliance Lounges. The RCC at terminal 2 is rather small, but there is also a Thai Airways lounge just before the security check forgate 31, I think. I have never seen the Singapore lounge open for the 7 AM flight, but you check them out, since they are right by the RCC. The Amari is connected to the Airport but is rather pricey. The Asia Hotel is nearby, and is a good value. I think that there are sleeping rooms on one of the upper floors, but I'm not sure, since I always go into town. Sorry I can't help with the transfer, having never done it. When are you flying? I'm on 882 on 3 MAR. Hope this helps.