You should probably call Washington State Patrol or Washington Dept of Motor Vehicles to be sure you get the correct answer, because it could be a very expensive mistake.

I think if it is still within the 3 days allowed on the permit, they will let it slide

The Oregon trip permit is only good for Oregon. When transiting multiple states you're supposed to get a permit for each state.

Chances of getting caught are slim though.

There is no Washington Dept of Motor Vehicles.

Why do you say the chances of getting caught are slim?

WaDOT. Wsdot.wa.gov

Nope, that's the department of transportation, highways. Not DMV. If you're going to try to pull a 'gottcha' at least cite the correct analogous department. dol.wa.gov.

Gee sorry for trying to be helpful

But it wasn't helpful. You tried to correct me, but you were wrong not I. And the DOT has nothing to do with the question at hand.

Thanks for trying, I guess.

I bow to your incandescent perfection

So you're not really into the whole humility thing, huh? That's cool.

Wow. Asshole of the day here. You can correct OC’s mistake without being an asshat. Must be all that humility weighing you down.