I was in Yellowstone three weeks ago. The place was packed with people. Busloads of Chinese tourists clogging the roads and walkways. Bison and elk were prevelant on the roadways and even walking up on the boardwalks. Warning signs concerning animals and keeping away from geysers/hot springs are posted everywhere you look. I witnessed several people walk right up to bison for photo ops and defy warning signs to go kneel down next to an active geothermal pool. Frankly, I’m surprised there aren’t more tourist deaths at Yellowstone.
I spent my 17th summer working in YNP...Don’t remember bison...it was the bears we were wary of.