The Plains regional subject files include materials about Native American communities and gaming in Iowa, Kansas, Missouri, Montana, Nebraska, North Dakota, Oklahoma, South Dakota, and Texas dating from approximately 1988 to 2008. The materials include socioeconomic reports, tribal-state gaming compacts, regulatory materials, Great Plains Indian Gaming Association materials, journal articles, Native American newspapers, periodicals, informational packets, court opinions, Dr. Spilde’s research photographs, National Indian Gaming Association (NIGA) site visit materials, newsletters, memos, National Gambling Impact Study Commission (NGISC) correspondence, press releases, fact sheets, video recordings of televised programs, promotional materials, and newspaper articles.

The Plains subseries focuses primarily on Native American gaming and non-gaming topics in Oklahoma, North Dakota, South Dakota, and Nebraska. The materials document a number of Native American nations, particularly the Sisseton-Wahpeton Oyate of the Lake Traverse Reservation; the Standing Rock Nation of North and South Dakota; and the Mandan, Hidatsa, and Arikara (Three Affiliated Tribes of the Fort Berthold Reservation, North Dakota).

Oral history interview with Daniel “D. J.” Allen conducted by Stefani Evans and Claytee D. White on June 21, 2024 for Game On! The Oral History of Las Vegas Sports project. In this interview, D. J. Allen describes growing up in Henderson, Nevada and playing baseball and basketball as a young person. He recalls listening to radio stations and learning to love the Los Angeles Dodgers and UNLV Runnin’ Rebels. He volunteered to write about Little League for the Henderson Home News and was hired as the full-time sports journalist. He parlayed his "Crazy Dance Man" persona into an internship in media relations with the Las Vegas Thunder hockey team, and from there, at 21, became Director of Media Relations for the Las Vegas Stars, all while he was still an undergraduate UNLV student. In this wide-ranging interview, he talks about working with Jim Livengood to help erase Las Vegas's "gambling" stigma with the NCAA and professional sports, get the NCAA athletic directors to begin talking about Las Vegas as a sports city, and about how Cisco Aguilar and Andre Agassi helped make these conversations happen. Among other topics, he talks about the Vegas Golden Knights, the Raiders, the Thunder, and the Stars and using sports as a platform to do good in the community. Digital audio available.