This video while long does a great job teaching you how to act in active bear territory.

The TLDW is: -

• In active bear territory carry bear spray and be ready to use it
• You can’t out run a bear don’t try
• bear bells don’t work
• playing dead makes it easier for the bear to maul you
• when hiking with a group and encounter an aggressive bear stand shoulder to shoulder and prepare your bear spray
• let the bear decide how they want to leave the encounter (if they are not attacking you)
• outside of a momma bear, most “attacks” are bluffs but can be scary as shit.
• guns work but you better be a good and quick shot cuz bears run fast and are very intimidating doing so
• a gun shot can help scare away most bears