Just saw this post. Thanks Dana for posting. From sampling a lot of paddlers about Mexico, it does seem most are wary of getting into some of the drug violence. I just want to say it's about as likely as you getting bumped off by the mafia in NY. Really - they don't target tourists. They have specific problems with other narcos, politicians, and cops primarily. I haven't heard of any reports of tourists having problems (if anyone knows of any, please inform me!). That's not to say the general mala gente isn't still around there to steal or rob from you, because they are. But this isn't any different now than 5 years ago. So - don't let the media hype you into hyperbolic fear of Mexico. In my 26 months of paddling/traveling down there over the last 10 years, I have not run into any such problems aside from some theft.
As for the Mulatos-Aros raft-support trips, yes the plan is to do one or two more next year (around August). It really is a trip comparable to most of the permitted long trips in the West.