I am seriously considering it, I too need to hold off on registering until I get some things at work straightened out. I would probably be 4 of us going: my mechanic/old friend, his fiance, my best friend (he can turn a wrench but is basically worthless but up for anything), and myself-a locomotive mechanic with lots of travel experience in an out of Mexico.
We would be taking 2 cars, my 2002 Montero Sport and a the mechanic's 2003 Toyota 4runner. In my experience neither will stand out in a crowd down there.
I'll have the vacation time for sure, it's just a matter of if my boss will let take off or not. I'd be interested in adding more people to our group.