Well, a quick test of no-gear-required cowboy coffee is surprisingly good. A matrix of testing options will now appear on the fridge, 'cos no-gear is camping gold.
(Grind rough so it settles easily; water, boil, allow to settle and cool. The subtleties come in getting the quantity right, and in how long you boil, and whether you put the coffee in from cold or from the boil, and what roast to use (this gleaming after-dinner roast produces an oily sheen of delight but by crikey it's got a bitter kick). Yay! Science!)