We are right on the border of SW North Dakota and NW South Dakota (Lemmon, SD).
Sadly, here in the Dakotas there aren't very many good examples to point to of people doing awesome permaculture stuff (although there are a few!). Down in SW South Dakota there are a couple people in the early stages of developing some permaculture projects (specifically on the Pine Ridge Reservation). Also over in eastern South Dakota there is the Glacial Lakes Permaculture site
http://glaciallakespermaculture.org/home.
The best example of sustainable agriculture in the Dakotas definitely has to go to Gabe Brown by Bismarck, ND. Here is an AWESOME video of Gabe talking about what they do at his farm/ranch. IMO, it is the best video to convince a conventional farmer/rancher to consider adopting some better techniques.