Do the vendors take credit cards as payment or is it only cash ?

Both

Some do. Some are cash only..

Depends on the vendor, but many take cards.

Both but cash is better; you may be able to bargain if you have cash

Some places accept credit card or even Venmo. It never hurts to ask before making a purchase

Cash is King

Most only accept cash it is better to just get money withdrawn prior to entry, there are ATMs but they have a crazy high user charge.