Self inflating pads are more comfortable than zrest, at least the thicker (and heavier ones). I prefer the Thermarest Neo-air short. Light as zrest, but inflates. (and of course most expensive.)

> Also, what size gas container should be bring for 2 people for overnight, or two nights?

I use the Titanium Esbit Wing Stove. One half-ounce tablet was enough for two dinners each evening. All you need is to make your own aluminum foil wind screen. The entire stove, windscreen and fuel is less than 4 oz!