Do they have bathrooms?

Yes. Flushable ones and portable ones.

They have them by the entrance and the portable ones.

Yes. Both flush toilets and outdoor toilets.

Yup, there's the ones by the exit and the green energy ones dispersed throughout

There is a regular bathroom by the entrance and other portable ones in the park.

There is a bathroom just around the corner from the main entrance. And there are others as well that are like port a potty tyoes.