Every year there is a free whole bus system in place. Outside the convention center and the white blowup building is a bus tent where they all stop.
Several routes with some going to the hotels, some to Eleanor Burns and some just up and down the hiway to Hancocks and the mall. Great way to rest the legs. One time I was sitting next to the Grand Prize winner. Pick up a schedule with the routes and keep it with you. I am going to be using it this year.
Be sure and get on the right one and, if your time is short, remember they do not come often and it usually is a nice slow ride. But free.