I love loking at old photos, but there are certainly photographers who used a mish mash of props. All of these photos are staged, but each shows some great material culture. Tail's clothing is probably his own. It is classic Lakota for the time period, but was probably not worn as his normal attire. The colorized photo is a guy named Bone Necklace. His clothing is likely his own too, or at least family clothing. again, by 1899 these guys probably were not dressing this way in their day to day lives. The bow could very well be something the photographer owned, but it is defiantly the right type, as are the blunt arrows. I think these guys are both Oglalla.
The photo of the girl is very interesting for, for many reasons. I don't know their tribal affiliation, but their clothing looks more like something from the 1930's.
Like the photos, the accuracy of what you hear from tribal elders can vary also. Tribal elders nowadays are my age. They are far removed from the happenings of the nineteenth century.
I am certainly enjoying the great stuff you all are posting on here. Keep it coming!