NU could be a weekend, March 9-10th.
Update: Have a guide booked on the NU for 1/2 day on March 10th. Got a deal on this for lodging; 2 nights for 1. about 10 miles upriver from Steamboat Inn. http://www.golastresort.com/CamperCabins.html
PDX area streams likely mid-week as I have family obligations for the weekend (St. Paddy's Day drunkeness).