NM Field Herping

It's coming up on that time of year again, and I've got the itch to field-photo two specific species of rattlesnakes, on top of some other herps that may or may not be found in their areas. Need any info on where to begin a search for Crotalus willardi obscuris and Crotalus molossus in New Mexico. Please, be more specific than "Animas Mountains, Bear-Indian-Spring Canyons, Hidalgo county." I've got that much already, and if there's any local guys, would love to meet up for a "field trip." Recently moved to northern NM, have all the pics of C. atrox and viridis that I really need, since they're in my back yard on warmer days. There are rumors of blacktails near Santa Fe, though I can't substantiate them....any help would be appreciated. Thanks