I can speak for northern California in Del Norte and Humbolt counties. Crescent City has a very good ramp and no bar to cross. Straight out of the harbor and into the ocean. Humbolt Bay has a good ramp as well, but you do have to cross a bar. They also sell live bait there if you have a tank and want to try your Steelhead tackle for some fun. Check the website below. It's for the Bat Area Tuna Club. It covers every launch ramp and harbor in California and they post the latest info on what ever they are catching and they give the numbers where the Tuna are at.
http://www.offshoreanglers.com/
If you want to try Brookings/Crescent City, let me know. We can buddy up and see what happens.
Mike