Seattle Cruise Parking

Seattle will be my normal cruise city and have questions about the Cruise Parking at or near Pier 91 or Pier 66. Clicked on Cruise Parking for Seattle and it appears that they only offer up to 7 days, or a full month. However I think that if a cruiser has a paid initial payment that it may be possible to park for 18 days at Republic Parking?

Also wondering how slow the traffic is on Cruise days? I will be driving to Seattle from the East on I-90.

There are two cruise parking lots near Pier 91. They sell cruise parking in 7 day or 14 day . Call and see it they will rent for 18 days.

Republic is a per day charge

https://www.cruiseseattleparking.com/pages/pier91

Seattle Cruise Park is for 1 or 2 weeks.

https://www.seattlecruiseparking.com/

... Also wondering how slow the traffic is on Cruise days? I will be driving to Seattle from the East on I-90.

We've had several cruises out of Seattle, one at pier 66 and the others at pier 91. No problems with traffic to pier 91. Pier 66 was more congested.