A lot of folks are going for a day or two towards the end of the show then staying for a few more days to enjoy Vegas after the crowds thin.
I said from day 1 of the date announcement that having it during CES was going to be a royal PITA. All hotel rooms (except Venetian which I believe has been booked for a while) are outrageously priced and getting a cab or restaurant reservation will be tough.
Time to take your party buses and black AMEX cards so you can get around and eat!
