Once there, an admission fee gets you into the park where there are many scenic overlooks. There are Golden Eagle and Golden Age discounts available. Much of the overlook views are available for the disabled, though climbing on the rocks is unwise - perhaps for all. Only rails protect you from the drop. Photography, though overwhelming, will not do justice to what's there.
Air rides are available outside the park, donkey rides to the floor are available within.
You can luck out and get a cancellation to ride without a reservation. Many get scared descending the ridges. The guides will tell you to close your eyes. We were at the Little America at Flagstaff in March, 1989. We were provided with free firewood for a chalet type suite.