This upper section of the Clavey is reported to be a classic section and significantly easier than the lower section. However, the road to the lower bridge can be in very poor condition so driving shuttle can be epic. Many boaters paddle both the upper and lower sections and then paddle out on the main Tuolumne. Some boaters camp at the lower bridge while some paddle both upper and lower sections in one long day.
Other Information Sources:
Boof.com forum
Clavey River Watershed Plan
Clavey River information from Friends of the River
Fred Norquist trip report from 2009