WMAN, I hunt that area every year. I would consider 4 hours to get a bear out an easy day with 12 hours not unreasonable. Think about that.... 12 hours of dragging. I don't know many that would be up for that.
I'm in "bear" country about as much as anyone I know hunting, scouting, or just hiking and I do see them without dogs but, it's because of YEARS of learning areas where bears frequent but, it's usually only a few times a year. I found 4 bears all in white oak trees "lapping" 3 days before bear season. I left them without them knowing I was there and came back 3 days later with my hounds and the bears had already moved on. It took 4 hours of walking just to reach where the bears HAD been.