I was last on Rucu almost two years ago and at that time there were no problems and hadn't been since the pistolero-bandito-rapist had been caught some years before. When I was there Dec09-Jan10 and Dec10-Jan11 I heard of no problems. Last trip I was probably up Rucu a half dozen times, sort of the default hike while making other plans or waiting for the weather to straighten out a bit. i saw several single male and female hikers and did it solo myself several times.
Have you heard of anything the past couple of years? I try to keep an eye on the situation down there and haven't seen any news about problems since I was last there. You could get in touch with the South American Explorers in Quito and see if they have any news. If there have been any recent problems, I'm sure they'll know. Their email is
quito@saexplorers.org