I've seen Peccaries down your way numerous times, not beyond the realm of possibility there may be Hogs around. Hogs can cover a lot of territory, 10-20 miles a night isn't all that unusual. I've hunted Hogs 125-150 miles north of you. I've even seen a troop of Coatis or Coatimundi down your way that weren't supposed to be there.

Doesn't really look like the Hog hair I've seen, I don't remember seeing it in bunches like that. I usually find it on barber wire fences or rubbed onto tree bark.

Maybe the feral Hog eradication program in San Diego county wasn't as successful as they claim, maybe a pack of Hogs found their way south?