I've only been to Cali once to paddle but it was awesome. I'd highly recommend the Giant Gap section of NF American (I guess its a little north of the Tuolumne). It felt like the Wind in terms of whitewater (maybe more creeky), but the scenery was outstanding. We posted on Boof.com the night before we wanted to run it and a boater from Sacramento rallied out to guide us down - pretty sweet.
Some of the best class 4 creeks I've ever been on are the Pauley and Lavezzola in Downieville (maybe hit them on your way down?).
We overnighted the lower T - super good trip, also recommended. Easily done in a day, but with the luxury of time we hiked up the NF T and did a little canyoneering/waterfall jumping
Do not run the Bear River, under any circumstances.