I’ll have to repeat that everything is made for the cars, even in a national park.
First, the access. There is no bus to get there. We arrived from Chicago, after 30 hours, changing 5 buses, at 5 am. We ate a very good scrumbled eggs in the restaurant at the bus station, and at 6 we walked to two nearby motels, to book for a night in one week. This way we found a place for the suitcase and cello. After that we bought the food to take in the mountains.

We arrived in time for the shuttle which brings volunteers in the park, twice per week. I put the luggage on the roof. But I made the mistake to ask where he will leave us.
he: – are you a volunteer ?
me: – no
…….
he: – are you a hitchhiker ?
me: – yes (I knew that’s the bad answer)
he: – there is no place
me: (pointing to the suitcases which were sitting on several seats) but we can keep them in our arms
he: – sorry, there are the rules

What a dispointment, after 33 hours, not to get a ride, because I haven’t lied, when there is no public transportation …

It took one hour to get a ride, from a farmer … of marijuana ! In Montana is legal for medical use. He started because his son is very ill. Now he makes a lot of money.
In order to get to the west entrance, we got another 4 rides. At the second ride, the driver apologised for the status of the American public transportation.
the third he had an adventure park for kids.
the fourth was renting snowmobiles. So all were locals.

In the park, it was pretty easy to get a ride, but still it was frustrating to wait for 10 minutes, to see 100 cars passing, and people not to care. In the park we got a ride from a Swiss girl who came for a Mathematics conference, one from a Mormon, and another one in a Christian organisation.

We hiked for 5 days in the backcountry, no bear, no bison, no nothing but squirrels and trees, even Yellowstone is   well known for its fauna. After this, we spent a day by car, with Stef and her son. Every parking site was the place for something: bison, geiser, bison, elk, canyon …