sounds like one of two things happened:

1. the campers somehow got between the mother and her cubs. no matter what kinds of firearms yo umay have, this is definitly a very ugly situation

or..


2. The bear was sick. Sick animals will do all kinds of things that are not normally of their nature.

There is a chance the bear just got hunger, or the kids were screwing with it...but more often than not a bear attack is a result of one of the option noted above.

oh..and a bottle of bear spray does very little when a ton of teeth and claws is charging at you.