I did Quillan back in September, and it was easy enough to navigate once you got in the canyon. There were quite a few walk arounds /climbovers on the motorway, but not enough to wear you out. The are trees down just above the cascasdes, before you get to amphitheater canyon. Past there, there were areas with trees down, such as in this photo
http://www.weathermansam..../091611camping/_3599.html , but it was usually clear on the opposite side of the creek and generally easy enough to get across. Judging from the damage I saw on the Hubbard section betweeen Quillan and Thompson that trip, I would imagine there is some damage on the lower end of parker for sure. It would fall in line with the path of downed trees.