The following were very helpful in providing information during a visit to Southwest Montana in August of 2010. Volunteers at the Living History Museum spent many hours over a weekend explaining everything they could think of to help.
Bannack City State Park: http://www.bannack.org/
Nevada City Living History program: http://www.virginiacitymt.com/LivHistory.asp
Beaverhead County Museum: http://beaverheadcountymuseum.com/