H2Blondie and I just got back from a weekend in Moab with Bill Burke. I can't recommend this course and instructor highly enough. He walks his talk. He has been operator and mechanic for every type of multiple drive axle vehicle imaginable (including tanks). He covers winching, jacking, getting unstuck and field repairs, all "hands on". We did some 4+ runs. I Would do it again in a heartbeat (and will at some other location) FWIW. You can find him at
http://www.bb4wa.com