$18 without a Montana fishing license, but found a GORGEOUS spot on the Yellowstone River… on July 4th. Not bad. Pretty place.
No water, but right on the Yellowstone River. You hear the road noise at night but if you need a beautiful spot as part of the Yellowstone excursion it's a good one nighter.
no amenities except vault potty, right on river! Nonresident $18, close to Yellowstone National Park, good for overnight