Bug - that story is tough!
I saw a mother and 3 cubs by Waptus Lake. We had turned a corner on the trail out into a clearing. We were about 25' or so away from the bears, and the bears saw us at the same time we saw them. They ran to the nearest tree about 20' away, the cubs climbed to the very top, and the mother stood behind the tree. We backed up a little but still in sight of the mother, and she started with the gruffing, so we backed up until she couldn't see us anymore. We started talking loudly so they could still hear us. We didn't want to bushwack, so we waited for about 30 min. for the bears to get the courage to take off.
Saw the same crew about 100 yards further down the trail. Cubs went running, we backed up again, and waited again.