Went last year at at the West Gate the town had a Mountain Man gathering. I pulled in there and spent 3 days camping in their open field parking lot used for the vendors. I'm sorta a mountain man looking guy anyways, so they let me in and issued me a vendor's pass even. Ha!
Anyways, there were several dirt roads off the main drag on the West side of the park that I spent the rest of my time camping down those. Near the KOA West Yellowstone campground. I'd go to that KOA to use their dump, laundry and shower for a fee, and even have their breakfast which was very good! They had a chef who worked at some fancy ski resort restaurant in the winter and short order cooked breakfasts at the KOA for a month or so, while he vacationed in the area.
BTW, just so you know, Glacier is easy to get walk-up camping. They have a website that shows how many are available each day and how soon they filled. You can go back a year, two years, etc and check the dates you want to go and how soon they filled. I went in August and was at the campground at 7am, got my choice of several spots and they were full by 9:30am. That was typical. If I can find that site again, I'll edit and attach.
