I just read about this today that the NPS has been sued over refusal to take cash as entry fee payment. I think it's wrong for a federally run agency to refuse to take the good old American dollar as a form of payment.
Visitors sue National Park Service over policy prohibiting cash payments
Three visitors sued the National Park Service (NPS) over their policy of prohibiting cash payments at various locations around the country. Elizabeth Dasburg from Georgia, Esther van der Werf…
thehill.com