This deals with fishing Rockfish in Alaska, but has a lot of good general information about rockfish and techniques.

http://www.fishalaskamagazine.com/archives/2003/0703_rockfish.htm

If you can find a copy at the library, New Techniques for Catching Bottom Fish by Doug Wilson and Fred Vander Werff, which is out of print and was written in 1978 can give you good insight on bottom fish.

It can also be found on Amazon.com as a used book.