What about the caregivers who support those who are permanently disabled? It's a case of it takes two for those that are disabled and unable to transport themselves.
My son is in a wheelchair and has had a pass for years through this program. If anyone in the vehicle has a pass the whole carload goes in on it for the same 'free'. It was actually a ranger when we were going into a park that turned us onto the program, they set us up and got us in all in one go at the gate, mailed the card a few days later.