plainjaneFJC
Deplorable
I am familiar with the SW, as I'm just north of you. You may want to start with getting some better tires. I'm assuming you've got the Defender M/S, which are good for road, ok for dirt, but you could do better in the "stoutness" arena. Get some decent A/T tires.
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What's better than being able to change out 2 flat tires? Not getting a flat in the first place.
Agreed if you need 2 spares, do you also carry extra belts,hoses, and spark plugs? Redundancy has a place, but this isn't an airplane. All that being said you want 2 spares get 2 spares. Shows up pics of the custom bumper when done.