Single action revolvers are high reliability fire arms.And the modern versions are also very safe to carry. People do not like to carry them because they are heavy.
Laziness can end your life in Grizzly Land.
Chest carry holster may be best although the baldric style holster belt over the shoulder with a waist and leg tie down is what I use.I have also seen leather tool belts with leather suspender straps modified to carry at the hip or small of the back.
I feel sorry for these guys. They were likely swept away by the elation of securing their kill, and anticipating a BBQ in the field.
I feel sorry for themselves and their families. Bear country is dangerous country and so is cougar country.