This is a really cool Montana treasure in my opinion. Lewis and Clark signed the sandstone here and its the only location of its kind. Not really a hot camping spot, but a really awesome piece of Americana and a worthwhile visit. If you are interested in Lewis and Clark, Montana has dozens of locations to visit: float the Missouri and camp where they camped, make some big life decisions at Decision Point near Loma, explore the museums at Fort Benton or Great Falls, and much more.