Yes, In So. Cal in the flatlands, ants are the # 1 pest.
When I lived in Corona, I actually had to put the dog food dishes in a tin and make a Moat around them.
I am temporarily living in my trailer in that area right now, and I have nothing in here that an ant could get into.. meaning my sugar is in packets, my dried goods are just that DRIED (Pastas only) and everythin else is in the
fridge or a can.
The little buggars even know how to get into tupperware, so I don't have ANYTHING they want out. (Candy is thier favorite thing.. and mine
)
Where I LIVE, and my trailer is most of the time, there are no bugs or mice. Have you considered living at 4600 feet?