Donald is correct, Alan would be a great also check out the Santa Fe workshops at http://www.sfworkshop.com/ though the last couple of catalogues indicate they are moving more to digital or The New Mexico Field School at http://www.photofieldschool.com/home.html
..But can not tell you much about them other than one of the instructors is Craig Varjabedian who's work I have seen and is very nice.

Good Luck..