yep, the road is pretty narrow with no shoulder, but if you can be seen (bright colors), the drivers are courteous. I would definitely take a mirror, but I think as far as narrow shoulderless roads go, it doesn't get much better.
I would definitely plan to camp if I were you, just because the camping is incredible on Baja. No joke, one of my favorite places I have ever travelled. The southern half is particularly magical...
PS, boojum tree forest!!!!! Its great in springtime, say march or so...