I can't walk a lot. Is there tram service to take you around the park. I can't walk up hills.

No, but there is an accessibility service center where you can ask what rides you'd be able to ride, or rent a wheelchair/electric wheelchair

There are trams to take you from the parking lot to the park and they also rent out wheelchairs and motorized wheelchairs. I believe the motorized ones were $41 and motorized with a shade were $51

Several people were riding around on motorized scootrrs.

I would suggest a scooter There's a lot of walking