One thing that surprised me was somehow a welder was brought along or available... Outside of a generator I'm sure electricity was non-existent.
From what I was able to piece-together of the video footage; it looked like the Wagoneer, which trailed the 5 CJ's, was loaded down with everything imaginable (a whole bunch of Jerry cans), to possibly include a butane-powered welding kit, or some such (?).