(I shouldn't be sharing this because of how special the Centennial Valley is.) I love the Centennial Valley, it is a place which feels untouched and even if it is, time moves slowly. And as far as the campground is concerned, it is such a quiet and relaxing place to be. Because it is off the beaten path, you can be sure that at the right time it is possible to actually have the campground all to yourself (your choice of spots). But do use the horse trailer to keep your food locked up for this is bear country, and be sure you buy gas in Lima, Montana or Dubois, Idaho if your coming in from the west off of I-15. Or somewhere in the Island Park area on U.S. 20 (where the price of gas is like highway robbery; better off to buy in West Yellowstone, Montana, the next closest place) if your coming in from the east.