What a classic kangaroo court you have here.
I'm wondering if this ticket will even go on your driving record. The state recognizes other states, but does it recognize a sovereign nation? Interesting question. Probably one for your insurance representative.
Reading the laws of the Swinomish Tribe:
5-01.190 Suspension.
The Court may order the suspension of a driver’s privilege to drive within the jurisdiction of the Tribe as part of any penalty ordered under this Title.
There is nothing there about the suspension of a driver's privilege outside of their nation or a direct link with WA DOL.
I wouldn't take my chances though.
Post up all of your materials and we'll see what we can figure out from them. From what I see, the officer will be required to go to court and testify as there is no code that allows him to write a statement and have that admitted without him present.

