This is national forest for the record, and yes, you can use lead shot here.
Unless it has some how been implemented without my knowledge, it is legal to use lead on WMAs. It's been probably 5-6 years since I squirrel hunted on a WMA, but it was legal at that time. NWR's are different and to the best of my knowledge, you must use steal shot.
While we're on the subject, I was in Cali a couple weeks ago and they had some newspaper articles about outlawing all lead bullets due to the condors eating lead bullets and dying. I really have mixed emotions about this, but it seems that the lead bullets could be banned only in the areas the Condors live. Just a random thought there. Really don't know why I brought it up.