Defensive Training Group, LLC, operates in Michigan and for those interested, they are offering a class this May in Primitive Adaptation Skills. Class size will be limited to 12 and all confirmed participants will be provided a list of items they should bring (it won't be long, DTG says).
Interested parties should drop a note to the DTG email listed on the web site under 'About/Contact us' for class pre-requisites. Directions/locations will be provided upon confirmed registration.
I know these folks and they are top flight.