You can book your parking here https://cruiseseattle.honkmobile.com/ by choosing BOOK YOUR PARKING from the menu across the top of the screen.
You will land on the reservation site and you can choose to book or manage your reservations.
Once you choose the 'Reserve a Parking Spot' you will be given several lots to choose from, and they all have different rates.
Accessible parking is purchased through TRANSPORT PARKING ZONE
Once you have chosen the lot/zone you can then choose the date that your cruise leaves which will be the first day of your parking.
You should see your related cruise listed and you can choose that to bring you to a Login Page for HONK. If you already have a HONK account you can login, otherwise you will need to provide your name, email, phone number and a password.
After creating your account you should land on the checkout page similar to below.

You can then complete your purchase. You will land on a success page and receive a receipt to your email that you signed up with confirming your reservation.
For further information or assistance can be found through the FAQ Section Here