New Mexico has a gillion prairie dogs but a lot/most of them are on private property. You just got to get out in the country side and ask the farmers and ranchers.
There are also some on public land, but we tend to hold those close to the vest as they say.
If you're coming this way, then give me a buzz and maybe I can rig something up for you on some of the private places that I shoot. I still don't give out info to my best shooting buddies about the public spots I have found. If I did, they'd be gone in no time at all!