I have a book called "vehicle dependant expedition guide" written for land rover owners specifically, but anyone who is planning an overland trip, good reading. On the subject of vehicle spares, it starts with the basics, plugs, points, leads, filters, full gasket set, clutch, full change of fluids (engine oil, diff oil, gearbox oil, brake fluid, coolant) electrical ancillaries, spare alternator, starter, battery, spare rims and tyres, plus tubes and bead breaker, goes on to talk about spare drive shafts, uj's, halfshafts, springs, shockers, bush's, wheel bearings, belts, timing chain, carb rebuild kit, bulbs, lamps etc, then goes on to specialist expedition stuff that i wont go into. The last line of the list talks about forgetting to take the Landy you have just gathered all the above kit for and taking a Bedford TK 4x4 instead!!!
"If it all seems under control, you're just not going fast enough!" Mario Andretti