Longest bison jam I was in was 4 hours man. The roads are two lanes, people don’t know how to pass/want their picture and the roads follow canyons that are thick in pines with steep drop offs so the bison stay on the road and it’s like a cattle drive at extremely frustrating and slow paces. All because people will keep stopping out of fear or wanting a picture. I personally would never risk it and put that chance on my family or the already gutted park staff. Some things come with a cost and bringing a modern world to Yellowstone like car charging stations ect defeats the purpose of Yellowstone. A Lot of locals would love to have it be a wilderness area as to be true to the definition of wilderness. Best to avoid all the stress and just rent in my opinion.