I promised the Altadena Hiker I'd post a photo of one of the cabins in Big Santa Anita Canyon. (Knowing her, I'll bet she's seen them all.) Here's Bombadil's Castle, one of the fancier ones. Look at that stone wall, will ya? I may be wrong but I'll bet they put it up because this one's right on the Gabrielino Trail and they wanted to discourage nosy dogs.
The Hermit Falls Trail, also in Big Santa Anita Canyon, is more remote--or, I should say, not as popular. The cabins along there might be a little quieter for the residents.
This, however, would be one drawback of living in the otherwise gorgeous canyon: you have to share your idyll with hikers.