Great ride report that brought back a lot of memories. In 2004, five or six if us rode pretty much the same route except we started in Alamos and rode to Choi, then on to Urique, Batopilas, etc. When we left Chinipas, ordinarily you would ford the river, as the only bridge across the river was the foot bridge. During the night before we left on the last leg back to Alamos, there had been more than a little rain in the mountains upstream. The river was running fast and deep - too deep for the bikes, so we jumped up on the foot bridge and dodged the school kids walking from the other side of the river into town for school.
From the looks of your photos, the roads, food, and accommodations have improved in the last 8 years. We went in April, at the end of the wettest spring they had had in years, so some of the "roads" were pretty rough.
Thanks again for the memories.