I don't buy the argument that we don't have more bears in the bowl. I have lived in the same house in the upper Hillside just a few lots down from the Upper Huffman entrance  to the park since 1983. In the first 25 years years would see a black bear or two once a year but never grizzlies. 

In the last 5 years, we now regularly see blacks nearly every month, frequently with cubs. 

About 4 years ago we had a pair of young brown bears that started hanging around the neighborhood and last week we had a brown sow with three cubs that wanders around regularly. This mother could easily be one of the two that started appearing 4 years ago. 

Three days ago, we had a black sow with three cubs that rambled through as well. I am not imaging these animals, I have pictures of all of them, and none had tracking collars. 

Bear population surveys are notoriously difficult. F&G was quite surprised by bear cam results in the Campbell Track a few years ago. Maybe its time to revise the estimates up.