The first attack was within 12 hours of these folks setting up camp. Also, after Googling the camp area, this ain't the back woods. This is a heavily used area with lots of camp grounds and it appears to be pretty near a more suburban area.

http://www.suscon.org/pir/AbandonedMines/pdfs/UintaNF_AmericanForkCanyon_MineralBasin_map.pdf

When you have lots of car camping going on, you are not going to get the back woods savvy and informing of a bear attack would be the common sense thing to do.