Is it open to the public Is it open to the public or just resort members or guests

Public but you need to pre-order tickets online and scan a barcode from your phone to get your pass, that can be a long line to get through the kiosk.

Only paying customers are allowed to park there.

Open to public but pre-order tickets online then get there and line up to print your card, just do that once as you can auto reload for next times.