Damn i really hate to start this again....reference:
(Props to to both crews there-i wish i could have been there!)
But the particular run you are talking about (horton creek down) has been run. In fact it was run by Jim McComb and Rob Rieterman in 1993. These are the two responsible for my kayaking obsession. They ran from horton creek all they way down to Tonto's Lower Box. One of Arizona's best multi-day creek runs, if not the best. The name of that run is "Tonto's Hells Gate".
This particular run (Headwaters Tonto) see: http://huckinhuge.com/Tonto_Creek_Headwaters_Story.html
It starts from above I206 down to bear flats (christopher creek's take out) Bear Flats. In fact, you have to run the lower box if you want to run full Christopher. And it had never been done, due to little to no water.
Enjoy the creeks...they'll be flown soon.