>>1576767https://en.wikipedia.org/wiki/List_of_national_parks_of_the_United_StatesArrange the list from least to most visitors and that gives you a starting perspective. Although you can just avoid crowded areas of any US NP and have secluded areas all to yourself. The North Rim of Grand Canyon NP on the Kaibab Plateau for example gets less than 600k visitors in year (1/10th the South Rim), and closes by Oct during the first snow storms, and usually gets 100-150 inches (2-3 meters) of snow in winter. Yellowstone is another good example of where you can just avoid the tourist hot spots and fuck off into the back woods and have a place to yourself usually.