I would think being that close to the border that US dollars would be accepted if you're in a pinch.

Eric - Thanks for sharing these amazing pics.  Couple of quick questions:

What size seat bag on Julie's bike?  And what brand of tarp/shelter did you use?

Thanks!

I definitely would not be in race mode w/ the Dummy.  My other option would be much lighter - my single speed Karate Monkey w/ either epic or carousel bags.  By the last two sections, I mean the entire NM portion - the last two maps. 
Thanks for the replies.

How much of the last two sections of the GDRMTB (New Mexico) is technical single track?  I'm planning to do all or part of the NM portion (my home state) this summer to get my feet wet w/ the idea of attempting the Tour Divide a year or two down the road.  What I'm really asking is - can this be done on a Surly Big Dummy?  I believe the Riding the Spine guys did it but would like to get thoughts/suggestions from those here who've done it.
Thanks!