You should grab Fly Fishing the Tahoe Region... it's a great primer on many of the watersheds around Tahoe...
http://www...en-Haggard/dp/0965256626
It has sections on the American, Yuba and Carson watersheds and includes creeks as well as still water options. It even lets you know if there is casting room at the lakes or if a float tube is needed.
The weather has been cooler the past few days and looks to stay cool this weekend last I checked, that might help on the creeks front, but it seems to be a real moving target.
B-