50 amp generator

Diesel will be heavier, and more of a low rumble VS higher pitch on the gas units, the most fuel efficient, if there is water in the fuel, you will get stuff growing on the bottom of the fuel tank, Fuel is not available *everywhere*, can be refueled out of gas cans or in bed fuel tanks. The propane tends to suck tanks dry, the least efficient of the bunch - but can last more or less forever in the tanks without going bad, and is the cleanest burning (least buildup of anything in the engine). Gas, if left alone goes bad in carbs and fuel lines, etc, readily available anywhere, can be refueled out of gas cans or in bed fuel tanks. Toyhaulers (usually) have a fuel station for the toys, this can also refuel the genset if needed.