Glacier National Park

Glacier has 13 campgrounds and more than 1,000 campsites in the park to choose from.  The campgrounds provide tent sites reached by windy dirt roads, all the way up to complete facilities and RV sites.  Commercial campgrounds are also available near both West Glacier and St. Mary

https://www.nationalparkstraveler.org/parks/glacier-national-park/camping-glacier

Finley Point

On the south end of Flathead Lake in Flathead Lake State Park near Bigfork, Mt, this campground offers spectacular views and dozens of features including a swimming beach, boat launch, public restrooms, RV hookups and other ammenities.

http://stateparks.mt.gov/finley-point/

Makoshika State Park

This park is the largest park in Montana with more than 11,000 acres.  Located southeast of Glendive, the park encompasses badlands containing dinosaur fossils and rock from the Hell Creek Formation.  You might even find fossils from a Triceratops here.

http://stateparks.mt.gov/makoshika/

Thompson Falls State Park

You’ll have to watch out for bears in this park, but the view of the mountains and waterfall is spectacular and well worth the visit.  Hiking trails along the Clark Fork River provide access to fishing, nature walks, swimming, boating, and birdwatching.  There are 18 campsites accommodating trailers up to 30ft long.

http://stateparks.mt.gov/thompson-falls/

Virginia City

This colorful pioneer mining camp is frozen in time.  Twenty miles west of Yellowstone Park you’ll relive the days of gold mining in Montana.  You’ll see living history plays, enjoy musical entertainment, and take a ride on an authentic stagecoach.  The campgrounds nearby offer full amenities for Rvs and trailers.

https://www.campendium.com/montana/virginia-city

Resources

You will find campgrounds to fit your needs near every spectacular destination in Montana.  From flatlands in the east to mountains in the west, you’ll have to visit many times to see it all.  Below is a great web site that gives you extensive information about Montana campgrounds.

https://thedyrt.com/camping/montana