2 years ago, September, the young man that was the host for the museum was Allan Harper's (D&S owner) son. He was friendly, helpful, and enthusiastic. He didn't know everything, but was there to help.
Remember, not everyone is a railfan, and not everyone may know everything you wish to know. On the otherhand, it's cheap and easy to hire a college person that simply needs to work.
Durango, Chama, and other NG operations are no longer Alamosa. The things that are there are intended for preservation and public enjoyment. Large hunks of steel are best left where they are ... if for nothing else to keep you from getting hurt trying to lift them. Locks are meant to keep honest people honest. Taking a 100 pound (or more) trinket home should not even be a consideration. ... and - it's only the railfans that would have a desire for it.
It's nice the D&S has a museum - unattentive attendants or not. Would you rather have a guided tour behind glass or iron fences?