Suggestions for Washington State Alternate Plan

You could check further east - the Sun Lakes, Banks Lake area and the Nat rec area behind Grand Coulee dam.

Another area would west along US2. Leavenworth for touristy stuff, Lake Wennatchee for state park camping. Stevens pass as an alternative to the WA20 North Cascades.

There are some closures along US97 around Omak, (coming south from BC), though with these largely grass fires conditions change rapidly.