No, you cannot camp anywhere in North Cascades National Park. Camping is allowed only in designated campgrounds and backcountry campsites. The park has several developed campgrounds, such as Goodell Creek Campground, Colonial Creek Campground, and Newhalem Creek Campground. For backcountry camping, you'll need to obtain a permit from the park. You can find more information about camping in North Cascades National Park here. If you're looking for alternative camping options outside the park, check out Hipcamp's North Cascades camping options for a variety of accommodations, including tent sites, cabins, and unique stays.