If you will be needing a scooter to use to help with mobility at the conference, there are two rental companies that will deliver and pick-up equipment to and from the MGM. Their websites are: 

scooterbug.com

and

cloudofgoods.com

There are a few choices on their websites for different types of scooter or walkers including different weight limits and features.  The more days you book, the lower the cost and payment needs to be made up front to reserve a scooter.