do they accept credit or debit cards at entrance or should i pull out cash?

Yes

It's a beautiful park. Don't know about the $$

Yes they do but cash works better

Majors CC,DC or cash, no accept checks ,bitcoins or any cripto currency.

Bring cash. You will need it in the park

We brought cash, but they did appear to accept most major credit cards.

The entrance takes credit cards and cash. And the concession stand doesn't accept amex

Yes you can make a payment with credit, debit or cash