I used this spot for the four days I was visiting Glacier NP. It's pretty easy to find and close to West Glacier. The dirt road is DUSTY, but it is what it is (turn your lights on so you're more visible). The dirt road and driveway is a little rough and pothole-y, but my Town and Country handled it just fine. 

Lots of sites to choose from; I was joined by a couple others each night and there was a bit of road traffic and people coming to put their rafts in the river, but it wasn't bothersome at all for me. 

Right on the Flathead River, surrounded by mountains, and it has a pit-toilet! As a solo female traveler, I would absolutely stay here again.