Do you have a smartphone? The Navionics app has a hydgrographic map of Newman Lake. The app costs about $10 and covers lakes and reservoirs in all 50 states. That should help you pinpoint areas to fish.
http://www.navionics.com/en/mobile-pc-app
Also, check out this presentation by a guy who fishes Eastern Washington for crappie. There's four parts. Here's the first one. Lots of great info.