You are likely to catch the same mix of rockfish nearshore regardless of depth. When you conduct 'normal' bottom fishing starting Jan1, 2018 (5 fish limit plus 2 lingcod, all depths Jan-March and Oct-Dec, inside 30 fathoms April-Sept), your hooks can be (and you can catch fish) at any depth you want.
The longleader offshore fishery (with hooks required to be at least 30' OFF the bottom) is required to avoid catching (and releasing) Yelloweye rockfish that stay near the bottom and are common at >40 fathoms. You can only retain rockfish commonly found out there: yellowtail, widow, canary, redstripe, greenstriped, silvergray, and bocaccio. 10 fish limit, no lingcod.