I have a platinum zoo pass so if I bring all my guests with me but we need 2 cars does the other car still have to pay for parking or is it covered by my pass since they are my guests?

Each car will have to pay for parking.

Only 1 car is covered on the zoo membership. All additional cars have to pay

Yes you have to pay for both cars

We bought a parking pass but nobody asked for it or asked us to pay. We went last weekend...

You should call a main directory to thehighest zoo manager consultant and ask permission and be Pacific.