Hi Nate,
I agree with Tom Robey in that you should pick up a Guia Roja, which is a road atlas of all Mexico. I also have pretty much all of the topo maps to the region and could help you out that way if you like.
I have been down here in Mexico doing river trips since July and will stay down until sometime in December. Do you have anyone else to paddle with yet? I'm looking for some partners, especially for November, and exactly for what you are looking to do (many of the classics, some overnighters, etc.: looking specifically at Rio Saltos, Rio Santa Maria, Rio Moctezuma, Rio Actopan, Rio Alsaseca, Rio Filo-Bobos, Rio Antigua). If you'd like to hook up, send something directly to me at my email address (
rocky@sierrarios.org). I will be in Queretaro (pretty close to Cd. Valles) in early November after doing a bunch more rivers in Guerrero/Oaxaca this month. I have several kayaks here and a raft. I have a Mexican cell phone here: (442)144-8979
Rocky