Review for MGM National Harbor Review For MGM National Harbor Google User Jan 18 '17 at 16:21 We went early on a weekday and had no problems parking. I would suggest that signs be posted in the garage directing one towards the elevator. A kind soul let us know. The casino is huge, and wonderfully smoke free. We quickly lost our money and went on the explore. We ate at Shake Shack and it was delicious. Looking forward to going again. View full site to comment or like