Definitely protect your roots. Gophers and other rodents are everywhere in Cali, if you grow outdoor you will almost for sure have to deal with them. It only takes one little gopher to take out a big, beautiful plant (seen it happen many times in others gardens). It does not take much additional time or money to protect your roots and it can end up saving your plants. I use aviary netting to protect the root balls of my in-ground plants, so far it has worked well. A container or raised bed also will kelp keep the plants safe.