The parking lot is huge, busy and a hike from the hotel but it worked out fine. I did end up calling the front desk from my car as I was trying to figure this out. If you’re staying at the hotel you enter the parking garage from one of the 5 casino entrances like everyone else (unless you are going to valet your car - then there is a specific entrance). I actually liked the layout and that you did not have to walk through the casino to get everywhere as you often do in Vegas. Feels much smaller to me than a Vegas hotel but still just as much attention to detail. I had a wonderful stay even with a few minor glitches.
The floral display in the observatory was breathtaking. The hotel is stunning, MGM did a great job with the décor.