Will I have to double pay rego when transferring?

My registration has expired a week ago and pay week is coming up. I fear I’ll get pulled over with an unregistered car and get a cop on a bad day.

If I pay the registration in the state it’s registered in, when I get it transferred to WA, will I have to pay again to have it registered to WA?

Will I be able to take it over the pits unregistered and/or register it to WA without registering it in the current state?