For those of you coming down, here's a great resource for camping along the way - about $20:
http://www.amazon.com/Travelers-Guide-Mexican-Camping-Explore/dp/0965296865
Travelers Guide to Mexican Camping: Explore Mexico and Belize with Your RV or Tent (Traveler's Guides (Rolling Homes)) [Paperback]
Mike Church (Author), Terri Church (Author)
http://www.amazon.com/Travelers-Guide-Mexican-Camping-Explore/dp/0965296865
Travelers Guide to Mexican Camping: Explore Mexico and Belize with Your RV or Tent (Traveler's Guides (Rolling Homes)) [Paperback]
Mike Church (Author), Terri Church (Author)