I agree with all the above. . . I wouldn't rent a yak, I would go out with a guide on either Clear Lake or if you want to stay in the sacramento area hit the delta with a guide. Coach is a great guide, Bobby Barrack is equally as great.
If your looking for stripers, I would recommend Barry Carnevaro (spelling might be off, on that last name). . . but any who he has a guide service called "Fish Hookers" this guy is loaded with knowledge of the delta (25+ years) and has a few magnificent vessels.
If I were you, I would go to Clear Lake. . . with a guide you will be tired of catching fish (good problem to have). CL is loaded with 5+ LB bass, it's almost unreal. . . You will definitely maximize your chances of catching a DD, (which with a guide you will probably accomplish). Larry Hemphil guides on CL, there are several guides up there. . . Youtube (Paul Bailey, aka Paul "Big Bait" Bailey) I know he is going to start guiding up there. . . He catches quality fish 90% of the time. . .
I'm excited for you, you have plenty of options, have fun out here in CA. . .
and as usual TIGHT LINES!!!