Every area in Washington is crowded on the weekends, it's a shitty fact of life for the area. All of the "outdoorsy" folk out here love their mountains.
For weekend skiing, I go to Snoqualmie. Again, it's the closest for me so if it sucks, I don't have far to drive back home.
You can have fun at Snoqualmie no problem. Just be aware of the lift lines at Alpental and the lower elevation and it's effects on the snow quality and you'll be fine. To be honest, I typically ride a powder weekend at Summit East instead of Alpental. More laps, more powder to go around, and far less lift lines filled with "hardcore" soul bros and their wannabe followers.
Stevens is a shitshow on the weekends as well, probably worse than Snoqualmie (Alpental excluded for this point). Lifts open at 9, but if you aren't in the lot by a little after 8 some days are you parking at their overflow lot a few miles down the road, or are shit out of luck and have a 2 hour drive back home with no skiing.