We came to the campground through the West Glacier entrance. You'll want to turn left onto Camas Rd before Apgar Visitor Center. It is about a 12-mile paved road through the park until you go over the Flathead River bridge. At that point, you turn left onto North Fork Rd, and it is a bumpy gravel road, but it is only about a mile to Big Creek Campground. It was raining the day we came in, so it was messy. Our travel trailer weighs 10k. I saw many other large RVs there. We had a location right on the crystal clear river. Gorgeous!