Conditions were pretty good last Saturday, due to the heavy snow they got the week before. The snow in the morning was really, really nice, but by afternoon it was a little slushy (temps at the base of the lift in the sun were nearing 50F). It was pretty crowded, but the lines went reasonably quickly -- 10-15 min. or so. coverage was quite good.
I'd use that free ticket you have soon -- the conditions aren't likely to be getting any better
. Though NE skier is right -- I think most of the region is supposed to be pretty warm and/or rainy the next few days. Sunday might be a better bet for Wa.