The Apgar Campground (early May–mid-Oct., $20; Apr. and mid-Oct.–Nov., primitive camping $10; winter camping free with park pass) is the park’s largest and most bustling, although sites are laid out to provide a reasonable amount of privacy. Depending on how you look at it, it’s either conveniently or annoyingly close to Apgar Village. Lake McDonald is a short walk away.

Just slightly off the beaten path, Fish Creek Campground (877/444-6777, www.recreation.gov, June–Labor Day, $23, reservations available with additional $9–10 fee) is a triple-looped jumble of trailers. It’s off Camas Creek Road on the northwestern shore of Lake McDonald. Fish Creek is a handy base for day trips around the Lake McDonald area and up the North Fork of the Flathead River. If you get up early, there’s seclusion enough for a bracing naked plunge into the lake (no showers at any park campgrounds).

Sprague Creek Campground (mid-May–mid-Sept., $20), on Going-to-the-Sun Road about a mile west of Lake McDonald Lodge, is appealing to some because of its small size and by not permitting towed RVs, but it’s actually less private and secluded than Apgar or Fish Creek. It is, however, a handy jumping-off point for bicyclists heading up the Going-to-the-Sun Road.

For a no-frills hike-in chalet, try the extremely popular Granite Park Chalet.