Yes , you would have to get a day pass of $10 or a year past for $30. BUT the VIEW WOW!
If you don't have a Discovery Pass, yes.
You can also buy the pass online in advance. For more information check it the Discovery Pass website. https://www.discoverpass.wa.gov/?gclid=CjwKCAjwzPXlBRAjEiwAj_XTETHi4OWxi2t_icCEC1zXdiEZvSbwuVrwljRGKZ6VtrnUF9DXLO2urBoCPWwQAvD_BwE
Cash or check only.
Yes, put the cash in the envelope, enjoy.
Yeah, worth the trip.
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