Bill Demoski is an Athabascan who grew up in Koyukuk, and lived in the Galena area on the Yukon River in interior Alaska, living a traditional hunting, trapping and fishing-based lifestyle. His father, Aloysius Demoski, was a dog team mail carrier in the 1920s and 1930s who depended on good lead dogs to help him determine where the ice was unsafe. Bill moved to Fairbanks around 2006 where he has applied his general knowledge of river ice to the Tanana River.
Bill shared his knowledge and experience about interior Alaska river ice conditions at the 2004 Dangerous Ice Workshop, and then on a number of Tanana River fieldtrips. He has a vast knowledge of Athabascan traditions related to river travel and winter survival.
Bill is also known for his sled building skills; in 2007 he built a traditional style wood freight sled for the University of Alaska Museum of the North, and in 2011 was interviewed about dog sleds and dog mushing for the Dog Mushing Project Jukebox.