They did this back in 2011. I guess they feel the terror threat is up again.
John
FW Security
In the months following 9/11 I stayed at Mohegan. I left my room with suitcase and was wheeling it through the casino to get to the parking garage. I was stopped by security and was forced to go another way which was much longer to get to my car. It was ridiculous, I was a hotel guest not some person who showed up at random with a suitcase.