Check out Bob Veverka's article here ...Cabo Article
Also a search on Cabo will bring up a few references.
Philster and Eddie have shore experiences down there. My trip was based in Cabo San Lucas where the dumper surf makes beach fishing practically impossible but the boat fishing just the other side of the swell is outstanding
Most of the beach fishing articles I've seen refer to the East Cape and Sea of Cortez side up to Loretto. There are a few guys doing Kayak trips in that area too.
Good luck - make sure to take lots of pictures and post a report when you get back!