If the Doubletree is booked,try BelairBobs' Backdoor Inn.
Located a few clicks north in the town of Niles,just off of Oakton Ave.
Check in is at 10PM and you have to be out by 5AM through the firescape.
The food sucks but the bed is always warm.Your choice of rental cars as well,but you'll have to put the stack of phone books back on the drivers seat & scoot it all the way up when finished.
There"ll be at least one vacancy during that weekend and I hear their shoeshinning service is second to none.