parking in dry grass with hot exhaust...

 

IMO, you have way to much for a wheeling trip, or a trip across the US for that matter. I carry one quart of gear lube, one gallon of anti freeze, one quart engine oil, and some power steering fluid, plus WD40. I check my fluids often, do regular changes and fix stuff before it lets me down on the trail.
I've never had to use any fluids on the trail but I've loaned out anti freeze and gear lube.

 

They were trying to winch themselves out, that is actually really soupy and sloppy mud there stuck in. holding a decently high rev and the dry grass is what caused it. They thought it was water hitting the motor that made the smoke. I said it was fire. I was right