Any recommended guides to help me find mammals in Southern Arizona?

I am planning a short ( about 4 days or so) mammal-oriented trip to Southern Arizona, Tuscon and south, in early October this year.  I have received good information from the reports posted on Mammal Watching, but because I do not know the area and have relatively short time on hand, I wonder if someone could recommend a person who I could hire to guide me.  I know that there are many cool birds there, but I will focus on mammals.

Thanks for any help (including good places to check out).

Jon S.