Just returned from a trip to North Cascades NP in WA. No crowds, no entrance fee, very scenic (more of a "sound of music" look with snow capped mountains jutting out of green forests and meadows). If you're ever up in that part of the country, it may be worth a look.
It is a 3-4hr drive from Seattle.
This is the view from our lodge on the east side of the park.
This is the view at 6500 ft "Easy Pass", 3.5 mi from the trailhead (at which we were the only ones parked).
And this is a scenic overlook on the west side of the park.