from their site:
Visiting Washington State
Visits of 60 days or less
You don’t need a permit to be on Washington waters for up to 60 days, as long as your boat meets one
of the following requirements:Visits longer than 60 days
If you’ll be on Washington waters for more than 60 days, you must apply for a permit on or before the 60th day of your visit.
To apply for a permit, visit any vehicle/boat licensing office
and bring along:
- Your unexpired state boat registration.
- Identification from your state.
You may renew the permit once for an additional 60 days. When the renewed permit expires, you must either register your boat in Washington State or remove your boat from Washington waters.
You ought to get the permit and so some cruising this summer before moving!!!