If the Seattle folks can't get through from Randle (as I'm almost sure is the case), the only interesting option is to ride down to Woodland on I-5 and come across FR90 through Cougar. It sounds like (I'm not sure) that you can continue across 90, turn left on Curly Crk to get to FR30 and then take it into Carson and the Gorge.
If you're in Carson you don't have good options to get home. You either backtrack back to Woodland, head back to Portland, or head down the Gorge to Goldendale and take 97 N to connect to I-82/I-90.
The out/back from Randle wouldn't be very interesting and you'd never hook up with anyone from the S.
No matter how you cut it, this is a a long day to a VERY long day with mostly interestate droning. Honestly, I'd wait until Windy Ridge opens.
Mr. Wet Noodle