Is there an ATM on site? Do dealers take checks or credit cards?

Many Dealers take CC's and there is an ATM.

Yes there is a ATM. Yes some vendors do take credit cards

The on site ATM can run out of money on busy weekends. If you're going later in the day in the summer, hit up an ATM at a nearby location instead. Many dealers do take cards, but not all of them.

There are ATMs available. Most vendors are set up to accept credit as well.