Looks like you are sticking to California and Oregon in which case White Water of the Southern Rockies will probably not help you much (although it is still a bitchin book and worth getting for entertainment and stoke value!)
I would find a copy of the Holbeck and Stanley, California Whitewater guide. It is getting a bit out dated but will still get you to the put in and highlight what you need to know. One of your best resources will be www.cacreeks.com
which is a great online resource for California and Oregon. Also (if you haven't already) check out forums.boof.com which will help you more locally. Plenty of rafters in the area 1st hand personal beta will be a great asset for you. Good luck!